Make a Heart Model with Recyclables!

Let’s make a heart model out of recyclable materials! As teachers, we’re always looking for fresh ways to help students understand complex ideas. The human heart, with all its chambers, valves, and blood flow, can be one of those tricky topics that’s hard for students to wrap their heads around. What better way to make learning the heart fun, interactive, and memorable?

This hands-on project doesn’t just help students learn about the heart’s structure and function. It also taps into their creativity, boosts problem-solving skills, and promotes teamwork—plus, they get to recycle!

Why Make a Heart Model?

The heart is a pretty complicated organ. It’s got several chambers, valves, and major blood vessels, and understanding how it all works together is key to learning about the circulatory system. But let’s be honest, it’s hard to picture how blood flows through the heart or what all those different parts actually look like without a tangible model.

By actually building a representation of the heart, students can visualize and physically interact with the different parts. This active, hands-on approach helps students make connections between the structure of the heart and its function in a way that’s much more effective than just looking at images. Plus, it works for all types of learners—whether they’re visual, tactile, or auditory.

What Should Be Included in the Heart Model?

For this project, students will need to make sure they include 12 parts of the heart. These parts will not only represent the physical structure of the heart but also help students understand how blood flows through the system. Here’s the list:

Aorta – The big artery that sends oxygen-rich blood to the body.
Vena Cava – The veins that bring oxygen-poor blood from the body back to the heart.
Pulmonary Artery – The vessel that carries oxygen-poor blood from the right ventricle to the lungs.
Pulmonary Vein – The vein that brings oxygen-rich blood from the lungs to the left atrium.
Tricuspid Valve – The valve between the right atrium and right ventricle.
Mitral Valve – The valve between the left atrium and left ventricle.
Aortic Valve – The valve between the left ventricle and the Aorta
Pulmonary Valve – The valve between the right ventricle and the Pulmonary Artery
Left Atrium – The chamber that receives oxygenated blood from the lungs.
Right Atrium – The chamber that receives deoxygenated blood from the body.
Left Ventricle – The chamber that pumps oxygenated blood to the body.
Right Ventricle – The chamber that pumps deoxygenated blood to the lungs.

These parts will be the focus of the model, but students will also need to show how blood flows through the heart—making sure everything connects in a way that reflects the real-life process.

How to Help Students Make a Heart Model

Step 1: Introduce the Heart

Before beginning the model-making, introduce the heart and its parts to your students. This is the time to show them diagrams, videos, and even animations if possible. You can also explain the flow of blood through the heart. Keep things interactive—ask questions like “What happens when the left ventricle contracts?” or “Why is the aorta so big?”

This step is essential to make sure students understand what they’re trying to represent in their models before they start building.

Step 2: Plan the Model

Once students are familiar with the heart, have them sketch out their model. They can start by drawing a rough diagram of the heart and labeling each part. This planning phase is all about figuring out how they’ll represent each part of the heart with the materials they have on hand.

Let’s make a heart model out of recyclable materials! As teachers, we’re always looking for fresh ways to help students understand complex ideas. The human heart, with all its chambers, valves, and blood flow, can be one of those tricky topics that’s hard for students to wrap their heads around.

Encourage students to be creative with their choices. For example, they could use cotton balls for valves, plastic bottles for heart chambers, and straws or tubes for blood vessels. The idea is to think outside the box and come up with materials that are easily accessible and recyclable. Students will also need to think about how to arrange the parts to accurately represent how blood flows through the heart.

Step 3: Gather Materials

Now it’s time for the fun part—gathering materials! Encourage students to bring in recyclable materials from home. They can use things like:

Plastic bottles or containers (for the chambers)
Paper or cardboard (to make the heart’s structure)
Straws, tubing, or even flexible wires (for blood vessels)
Bottle caps, rubber bands, or fabric (for valves)
Markers or paint (for labeling)

I like to collect recyclables all year and store them in a box in the classroom. I even have my other classes bring in recyclables to donate!

Step 4: Build the Model

Once all the materials are collected, it’s time to get building. Encourage students to work in pairs or groups of three (tops) so they can collaborate and share ideas. As they build, remind them to focus on accuracy—each part of the heart needs to be correctly positioned, and the flow of blood should make sense.

The beauty of this hands-on approach is that it allows students to experiment. Maybe one group decides to use a plastic bottle for the left ventricle, while another group uses a different type of container. There’s no one “right” way to build the heart, but the important thing is that the model should be clear, functional, and accurate.

Want a ready-to-use FREE resource to make this project happen in your classroom? Click here for a free project download, including Student Instructions, heart part labels, project example photos and a detailed teaching guide!

Step 5: Present the Model

Once the models are completed, it’s time for students to present their work to the class. Each group should walk through their model, explaining the names and functions of the different parts, and showing how blood flows through the heart. If students use color-coded materials (blue for deoxygenated blood, red for oxygenated), that will make it even clearer for everyone.

Presenting the model will also help reinforce their understanding. Teaching others is one of the best ways to solidify your own learning!

I like to do this project around Valentine’s Day! When I do, I encourage students to take a photo of their models and send it to their ‘Valentine’ <3

Valentine's Day activity for high school students! Make a model of the heart and send to your Valentine

Related: If your looking for more fun Valentines science activities, check out this post from Ana at Science is Real!

Making Models Helps Learning

Building a heart model has lots of benefits!

Visual Learning: Seeing and touching a physical representation of the heart helps students make connections that are harder to grasp from just reading or listening.
Engagement: Hands-on projects make learning more engaging. When students are actively building something, they’re more likely to remember it.
Collaboration: Working in groups helps students practice teamwork and communication skills. They’ll have to discuss their ideas and make decisions together.
Creativity: Let’s face it—creative projects are fun! Giving students the freedom to design their heart model encourages them to think outside the box and enjoy the learning process.

Related: Build a Plant Cell Model with Recyclable Materials!

The Benefits of Creativity in the Classroom

Creative projects, like building heart models, offer a ton of benefits beyond just learning about the heart. They help students develop problem-solving skills as they figure out how to represent each part of the heart. Creativity also keeps students motivated and makes the learning process feel less like a task and more like an enjoyable challenge.

So, grab those plastic bottles, straws, and cardboard, and let your students’ creativity flow!

Related: Circulatory System and Parts of the Heart Review Game – No Prep!