TEKS & Objectives
7.12.B. identify the main functions of the systems of the human organism, including the circulatory, respiratory, skeletal, muscular, digestive, excretory, reproductive, integumentary, nervous, and endocrine systems;
We will explore the circulatory system.
I will simulate the pumping action of the heart muscle using a model.
1. Watch videos.
2. Review vocabulary and complete quiz.
Heart This muscle pumps blood through your body.
Circulatory System Powered by the heart, it pumps blood through a vast network of blood vessels, carrying oxygen and nutrients to every cell in the body while picking up waste to be filtered out
Vein These are tubes (called blood vessels) that bring blood from all over the body to the heart. Think “V” for Visits the heart.
Artery These are tubes (called blood vessels) that bring blood from the heart to the rest of the body. Think “A” for Away from the heart.
3. Test a working model of a heart.
How to make your heart:
You will need:
- A clean, transparent jar
- 1 balloon
- Water
- Food colouring
- 2 plastic straws
- Tape
- Scissors
- Tray
Steps to complete:
- Fill the jar just over half full and add a few drops of food colouring.
- Cut the neck off the balloon and stretch the rest over the opening of the jar. Save the balloon neck.
- Use the scissors to carefully poke two holes in the balloon. These should be smaller than the straw as you need them to fit tightly.
- Push each straw through a hole in the balloon.
- Place the neck from the balloon over the end of one straw ends and attach in place with tape. The is your valve. You can also use Play-Doh to close one straw, as shown in the video.
- Press down on the balloon and watch what happens. Water should be forced out of the straw that isn’t sealed.
- The balloon end/Play-Doh valve stops water from going back down the straw.
- Take the balloon/Play-Doh valve off the straw. You should find that water now goes back down the straw.
- When you push down on the balloon this is like your heart contracting and squeezing the heart chambers. This pushes blood out of the heart and into arteries.
Click below for details.
BONUS Wordsearch
Speaking of the circulatory system…
Why didn’t the skeleton tell his friend he was missing a bone?
He didn’t have the heart to.
4. “The Circulatory System”
