Integumentary System Functions Lesson Plan (TEKS 7.13A): A Complete 5E Lesson for Skin, Hair, Nails, and How the Body's Barrier Protects You

Chris Kesler · 10 min read

The first time I asked a class of 7th graders to name the largest organ in the body, most of them said the heart. A couple said the brain. One kid said the stomach. Nobody said the skin. When I told them their skin weighs about six pounds and covers them from head to toe, half the room looked at their hands like they were seeing them for the first time. "My skin is an organ?" Yep.

What flipped it was a quick demo on Day 1. I had every kid put a finger on the back of their hand and gently pinch the skin. "Feel that? Three layers under your finger right now. Each one doing different jobs." Then I asked what would happen if their skin disappeared for thirty seconds. Bacteria everywhere. Water loss. No way to feel temperature. No way to stay warm. From there, the integumentary system stopped being "the boring system at the end of the unit" and became one of the most surprising organs in the body.

That's the core idea behind this 5E lesson for TEKS 7.13A. Students don't just memorize the layers of skin. They explore thermoregulation, design a model of human skin, and walk away understanding why the integumentary system is the body's first line of defense.

⏱ About 10 class periods 📓 7th Grade Life Science 🧴 TEKS 7.13A 🎯 Differentiated for D + M 💻 Print or Digital

Inside the Integumentary System Functions 5E Lesson

The 5E instructional model walks students through five phases: Engage, Explore, Explain, Elaborate, and Evaluate. It flips the traditional lecture-first sequence on its head. Students explore a concept hands-on before you ever explain it, which means by the time you do explain it, they have something to hook the vocabulary onto.

I switched to the 5E model years ago and stopped going back. Kids retain more, ask better questions, and stop staring at me waiting to be told the answer. The Integumentary System Functions 5E Lesson is built on this framework from start to finish. Here's how it plays out across the five phases.

🎯 Engage

I CAN statement and key vocabulary for the integumentary system functions lesson

Day one is a teacher-led hands-on touch-receptor investigation. Each pair of students gets two toothpicks taped together at varying distances (5 mm, 10 mm, 20 mm) and uses them to gently test the skin on their partner's fingertip, palm, forearm, and back of the neck. The partner closes their eyes and reports whether they feel one point or two. Students discover that different parts of the body have wildly different numbers of touch receptors. A fingertip can feel two points only millimeters apart. The back of the neck might feel a single point even when there are clearly two.

By the end of the period, kids have their two-point discrimination data on a student sheet and they can explain in their own words that skin is more than a covering. It's an active sensory organ that's denser with receptors in some places than others. Nobody has heard a vocabulary lecture yet. That's the point. They're walking into the rest of the unit with a working mental model, not a memorized definition.

What's included in the Engage:

Teacher directions for the two-point discrimination experiment
Printable student observation sheet with data table
Answer key for the discussion questions
Four learning objective slides (standard verbatim, "Identify" and "Describe" verbs highlighted, "I CAN...", and "WE WILL...")
An illustrated Body Systems Word Wall in English and Spanish covering the full unit vocabulary

🔬 Explore

📷 Explore image 1 — wide shot of Station Lab in action

The Integumentary System Functions Station Lab is the heart of the Explore phase. Students rotate through 8 stations (plus a 9th challenge station for early finishers) over one class period. The Station Lab is split into four input stations (where kids take in new information) and four output stations (where they show what they learned).

The four input stations:

🎬 Watch It! — Students watch a short video on the three layers of skin and the functions of the integumentary system, then answer guided questions on thermoregulation.
📖 Read It! — A one-page reading passage at two differentiated levels, with a Spanish version included.
🔬 Explore It! — Students design a phone case modeled after human skin (stretchable, waterproof, protective, sensitive) and sketch out the features each layer would contribute.
💻 Research It! — Reference cards on the epidermis, dermis, and hypodermis, plus sweat glands, sebaceous glands, hair, nails, and sensory receptors.

The four output stations:

📋 Organize It! — A card sort where students place skin structures into the correct layer (epidermis, dermis, or hypodermis) and justify their choice.
🎨 Illustrate It! — Students draw a labeled cross-section of skin showing all three layers, with hair, sweat glands, blood vessels, and nerve endings labeled.
✍️ Write It! — Three open-ended questions in complete sentences (this is where you see who really gets thermoregulation).
📝 Assess It! — A short formative check with multiple choice and a fill-in-the-blank vocabulary paragraph.

📷 Explore image 2 — close-up of featured station (Explore It! or Organize It!)

Print and digital versions are both included. If you want the full breakdown of what happens at every single station, what students produce, and how to set it up, that's in our dedicated Station Lab post.

→ Read the full Integumentary System Functions Station Lab walkthrough 8 stations, materials list, teacher tips

The Station Lab is included in the full 5E lesson. You don't need to buy it separately if you're getting the whole unit.

📚 Explain

📷 Explain image 1 — Presentation slide screenshot

Here's the real payoff of doing the Engage and Explore before the Explain: by the time kids hit this phase, they've already tested their own touch receptors and designed a skin-inspired phone case. They have a working understanding before you ever start naming things. The discussions get deeper, the questions get sharper, and you spend less time defining and more time pushing their thinking.

The Integumentary System Functions Presentation walks 7th graders through the full scope of TEKS 7.13A for this system, one concept at a time. The deck opens with the big idea: the integumentary system is the body's barrier between the inside and the outside world. It protects against bacteria, foreign substances, injuries, and harmful UV light from the sun. It helps regulate body temperature, senses the external environment, and produces vitamin D from sunlight. The four main organs of the integumentary system are skin, nails, hair, and the glands near the surface of the skin.

📷 Explain image (middle) — Presentation slide screenshot (classification hierarchy, Essential Question, or category comparison)

From there the deck zooms in on the skin, which is the largest organ of the body. The average adult's skin weighs about 2.7 kilograms (6 pounds) and would cover roughly two square meters if you laid it flat. The deck walks students through the three layers in order. The epidermis is the outermost layer made of tightly packed dead and dying skin cells. It's waterproof, it sheds constantly (you lose about 30,000 to 40,000 skin cells every minute), and it produces a protective film that helps kill germs. The deeper part of the epidermis contains melanocytes, the cells that make melanin and give skin its color and UV protection. The dermis sits below the epidermis and is where the real action happens. Blood vessels, nerves, hair follicles, sweat glands, sebaceous (oil) glands, and sensory receptors all live in the dermis. This layer is what makes skin a working organ instead of just a wrapper. The hypodermis is the deepest layer, made mostly of fat tissue. It cushions the body, stores energy, and helps with insulation against cold temperatures.

Then the lesson tackles thermoregulation, which is one of the most important jobs the integumentary system handles. When your body gets too hot, sweat glands in the dermis release sweat onto the surface of the skin. As that sweat evaporates, it pulls heat away from the body and cools you down. At the same time, blood vessels in the dermis widen so more blood flows close to the surface, releasing heat into the air. When your body gets too cold, the opposite happens. Blood vessels narrow to keep warm blood deep inside, sweat production stops, and tiny muscles attached to your hair follicles contract to make your hair stand up. That last one is what produces goosebumps. The deck includes a built-in Quick Action INB task where students sort body responses into "too hot" and "too cold" categories. The deck also covers vitamin D production (UV light triggers vitamin D synthesis in skin cells) and how skin heals after a cut, with clotting cells, immune cells clearing out debris, and new skin cells growing to seal the wound.

📷 Explain image 2 — Presentation slide screenshot

The deck closes by tying the integumentary system back to the other body systems it works with. The integumentary and immune systems work together because skin is the body's first line of defense against bacteria and viruses. The integumentary and circulatory systems work together for temperature regulation, with blood vessels widening and narrowing to manage heat. The integumentary and nervous systems work together because sensory receptors in the skin send signals to the brain about touch, pressure, pain, and temperature. That kind of cross-system thinking is exactly what TEKS 7.13A is asking for.

What makes the Integumentary System Functions Presentation different from a typical body-systems slideshow is that kids are doing something on almost every slide. It's not a lecture deck. It's a participation deck. "Your answer:" prompts appear on most slides, Brain Breaks reset attention every few slides, and Quick Action INB tasks (skin-layer sorting, thermoregulation matching, function mapping) show up throughout. Think About It prompts push deeper into bigger ideas like why severe burns are so dangerous and how desert animals handle heat differently than humans. The deck closes with a Check for Understanding tied back to the Essential Questions: What are the main functions of the integumentary system? and How does the integumentary system interact with the other body systems?

The Explain materials in this product include:

An editable Presentation at two differentiated levels (Dependent and Modified), works in PowerPoint or Google Slides
A guided fill-in-the-blank student notes handout that mirrors the Presentation, with answer key
A Paper Interactive Notebook (English and Spanish) students cut, fold, and glue into their notebooks
A Digital Interactive Notebook at both levels with answer keys, for 1:1 classrooms or Google Classroom

The Explain runs across two class periods. The built-in Think About It prompts are where the real discussion happens, so let those breathe.

🛠️ Elaborate

Student choice project options and rubric for the integumentary system functions lesson

The Elaborate phase is where students stretch what they learned about the integumentary system and put it into a project of their choosing. In this 7th grade life science lesson, that's a Student Choice Project board with six different project options plus a "design your own" pathway.

Students might build a 3-D model of a cross-section of skin showing all three layers with sweat glands, blood vessels, and hair follicles labeled, design an infographic of how thermoregulation works on a hot day, write a journal entry from the point of view of a single sweat gland working overtime during a soccer game, or record a short video explaining why the skin is considered the largest organ of the body and what would happen if it stopped working. There are options for kids who love to write, kids who love to draw, kids who love to build, and kids who love to perform. Whatever the project, the point is the same: students apply skin layers, thermoregulation, and system interactions to a real-world artifact instead of a worksheet.

Choice is the whole point. By letting students pick how they show their thinking, you get more authentic work for TEKS 7.13A and you actually get to see what they understand about the integumentary system.

The rubric (the part teachers actually want)

Every project, no matter which option a student picks, is graded on the same rubric. Five categories at 20 points each:

Vocabulary (20 pts) — At least four words from the lesson are used in context.
Concepts (20 pts) — At least two key concepts from the lesson are referenced.
Presentation (20 pts) — The project grabs attention and is well-organized.
Clarity (20 pts) — Easy to understand. Free of typos.
Accuracy (20 pts) — Drawings and models are accurate. The science is right.

The rubric uses a minus / check / plus shorthand on every row so you can grade a stack of projects quickly without re-reading every criterion.

Two differentiated versions in one file

The standard version is for students ready for independent application of integumentary system ideas. The Reinforcement version is for students who need additional vocabulary or concept support. Three of the six options are swapped for projects with a tighter vocabulary tie-in, and "design your own" is replaced with "collaborate with the teacher" so kids aren't pitching cold.

✅ Evaluate

The Evaluate phase wraps the unit with a formal assessment. It's not all bubble-in. Several questions show students cross-section skin diagrams and ask them to identify the layer, the structure, or the system interaction at play.

The full assessment has 12 questions across five formats:

Multiple choice (4 questions) covering the three skin layers, thermoregulation, vitamin D production, and the main functions of the integumentary system
Hotspot / visual (2 questions) where students click the dermis on a skin cross-section and identify a sweat gland in a labeled diagram
Multiselect (2 questions) where students pick all the structures found in the dermis, and all the ways the skin protects the body
Short answer (2 questions) on how the integumentary system helps regulate body temperature on a hot day, and on how it works with the immune and nervous systems
Multipart scenario (2 questions) with a real-world example (a student getting a sunburn) where students identify which skin layer is damaged, explain the role of melanin, and describe how the body heals the burn

A modified version is included for students who need additional support. Fewer multiple-choice distractors and sentence-starter scaffolds on the short-answer items.

If you've taught all five phases, this assessment shouldn't surprise anyone. It's a chance for kids to show you they get it.

How everything fits together

If you want the whole experience (Engage hook, the Station Lab as the Explore, the Explain day with Presentation and interactive notebook, the Student Choice Elaborate, and the Evaluate assessment all in one download), that's the Integumentary System Functions Complete 5E Science Lesson.

If you only need the one-day hands-on activity, the Station Lab works as a standalone. Most teachers buy the full 5E because the Station Lab works harder when it's bookended by a strong Engage and a follow-up Explain. But both are honest options.

Two options

Integumentary System Functions Complete 5E Lesson cover

Full 5E Lesson — ~10 class periods $13.20 Get the 5E Lesson

Integumentary System Functions Station Lab cover

Just the Station Lab — 1–2 class periods $7.20 Get the Station Lab

What you need to teach Integumentary System Functions (TEKS 7.13A)

Materials beyond what's in the download:

Toothpicks and tape for the Engage two-point discrimination experiment
Construction paper, markers, and reference images of phone cases for the Explore It! skin-inspired phone case design
Index cards for the skin-layer sort at the Organize It! station
Pencils, colored pencils or markers, and printed student pages
A device with internet for the Watch It! station and the slide deck

Standard covered: Texas TEKS 7.13A — Describe the function and interactions of major body systems in organisms, including the skeletal, muscular, nervous, respiratory, integumentary, circulatory, endocrine, digestive, immune, and urinary systems. See the full standard breakdown →

Grade level: 7th grade science

Time: About 10 class periods of 45 minutes each, done with fidelity. The product also ships with a compressed sample unit plan if you need to move faster.

Common misconceptions this lesson clears up

"Skin is just a covering, not a real organ"
Skin is absolutely an organ. In fact, it's the largest organ in the body. An organ is a group of tissues working together to perform a specific function, and skin checks every box. It has multiple layers of different tissues (epithelial tissue in the epidermis, connective tissue in the dermis, fat tissue in the hypodermis), and those tissues work together to do at least five major jobs. Protection from bacteria and UV light. Temperature regulation through sweat glands and blood vessels. Sensation through nerve endings. Vitamin D production from sunlight. Wound healing through clotting cells and new skin growth. A piece of plastic wrap is a covering. Your skin is a working, multi-tissue organ that's busier than most kids realize.
"Tanning is healthy because it provides vitamin D"
Vitamin D is real and your body does make it from sunlight, but the tan part is a problem. A tan is your skin's emergency response to UV damage. When UV radiation from the sun hits your skin cells, it damages the DNA inside them. To protect deeper layers from further damage, melanocytes in the epidermis produce more melanin, which darkens the skin. That's the tan. So a tan isn't a sign that your skin is healthy. It's a sign that your skin has already been damaged and is trying to defend itself. Your body only needs about 10 to 30 minutes of casual sun exposure a few times a week to make plenty of vitamin D. After that, more sun just causes more damage, which over time can cause skin aging and increase the risk of skin cancer. Tan equals damage. Sunscreen is the integumentary system's best friend.
"Goosebumps are just a chill reflex with no function"
Goosebumps have a function, just not a useful one for humans anymore. When you get cold or feel a strong emotion, tiny muscles attached to each hair follicle (called arrector pili muscles) contract, which pulls the hair upright. That's what produces the little bumps on your skin. In furry mammals like cats and bears, this response is super useful. Standing hair traps a layer of warm air close to the skin and makes the animal look bigger and more threatening to predators. Humans have so little body hair that the response doesn't really do anything for us anymore. It's an evolutionary leftover. The mechanism still works, the muscles still fire, but the hair you're trying to fluff up barely exists. Same reaction in your dog or cat, much more dramatic effect.
"Hair and nails keep growing after a person dies"
This one feels true because dead bodies look like the hair and nails grew, but they didn't. What actually happens is the skin around the hair and nails dries out and shrinks after death. As the skin pulls back, it exposes more of the nail and hair shaft that was already there underneath, making it look like growth happened. But hair and nails are produced by living cells in the dermis (for hair) and the nail matrix (for nails), and those cells stop working when the body's blood flow stops at death. No new cells, no new hair or nail. The illusion of growth is the skin retreating, not the hair or nail extending. It's a great example of why what looks obvious isn't always what's actually happening.

What's included in the Integumentary System Functions 5E Lesson download

📷 Inside-the-product — add screenshot of Read It passage or sample answer sheet

When you buy the Integumentary System Functions Complete 5E Lesson, you get a single download with the whole unit:

✅ Engage materials — teacher directions, student observation sheet, answer key, four learning objective slides, illustrated Body Systems Word Wall (English + Spanish)
✅ The full Station Lab — 8 stations + 1 challenge, print and digital, two reading levels, Spanish Read It!
✅ Explain materials — editable Presentation at two differentiated levels (with built-in Brain Breaks, Quick Action INB tasks, and Think About It prompts), guided fill-in-the-blank student notes handout with answer key, Paper Interactive Notebook (English + Spanish), Digital Interactive Notebook at two levels with answer keys
✅ Elaborate (Student Choice Projects) — 6 project options + design-your-own, plus a Reinforcement version with vocabulary-focused alternatives, 5-category rubric included
✅ Summative assessment — full 12-question version and modified version with sentence-starter scaffolds, both with answer keys
✅ Sample unit plan — day-by-day pacing guide

A couple of real-talk tips from running this lesson

1. Lead with "the skin is an organ" on Day 1.

Open the unit by asking, "What's the largest organ in the human body?" Take a few wrong guesses (heart, brain, lungs) before revealing it's the skin. Then drop the six-pound stat. That mental shift in the first five minutes carries the rest of the unit. Kids stop seeing skin as a wrapper and start seeing it as a working system.

2. Use the two-point toothpick demo for sensory receptors.

It costs nothing and it's memorable. Kids can't believe a fingertip can tell two points apart only 5 mm away while the back of the neck can't tell them apart even at 30 mm. The data they collect themselves is way more convincing than reading about sensory receptor density.

3. Don't skip the tanning misconception conversation.

7th graders are about to hit a stretch of years where tanning is glamorized everywhere. The fact that a tan is literally damage your body is trying to repair, not a sign of health, is a piece of science they'll carry for life. Take the five minutes to walk through it carefully. Health class won't.

Get the Integumentary System Functions 5E Lesson

Buy the full Integumentary System Functions 5E Lesson — $13.20

Or if you only need the one-day hands-on Station Lab:

Buy the Integumentary System Functions Station Lab — $7.20

(The Station Lab is included in the full 5E Lesson)

Frequently asked questions

Does this cover all of TEKS 7.13A?

For the integumentary system, yes. The full standard asks students to describe the function and interactions of all 10 major body systems. This lesson covers the integumentary system in depth, including the three skin layers and how it interacts with the immune, circulatory, and nervous systems. We have nine more 5E lessons for the other body systems under the same standard.

What do my students need to know before this lesson?

A basic understanding of cells, tissues, and organs from earlier grade-level standards. If your kids can describe what an organ is and the difference between a cell and a tissue, they're ready.

How long does it take to teach?

Done with fidelity, about 10 class periods of 45 minutes each: one day for the Engage, two days for the Station Lab, two days for the Presentation and Interactive Notebook, three days for the Student Choice Project, and one to two days for review and the assessment. A compressed sample plan is included in the file if you need to move faster.

Do I need special supplies?

Just toothpicks and tape for the Engage two-point discrimination experiment, plus construction paper and markers for the Explore It! phone case design. Most teachers already have what they need.

Does this work for digital classrooms?

Yes. Every component has a digital version. The Station Lab is fully digital-ready (Google Slides), the Presentation works in Google Slides, and the Student Choice Projects can be submitted as videos, slide decks, or written work.

Is this 5E lesson aligned to NGSS too?

It aligns with MS-LS1-3 (using arguments supported by evidence for how the body is a system of interacting subsystems composed of groups of cells). Built TEKS-first, but the standards overlap.