Circulatory System

• Science
• Primary Education
• Age 8,9

Grade 3

Introduction to the 

Circulatory System

True or False: Your heart will beat about 115,000 times each day.

True or False: Each day, your heart pumps around 2,000 liters of blood.

True or False: The Blue Whale has the largest mammal heart, weighing more than 1,000 pounds!

What do you think the circulatory system is?

What do you think the
Circulatory System is,
after watching the video?

Group Research

In groups of 2-3, read through the website on the next slide.

Choose one thing you already knew, two things you learned, and ask three questions you still have.

Write your answers down on the group research answers slide!

kidshealth.org

What is one thing you already knew about the circulatory system while reading through the website?

What are two things you learned while reading through the circulatory system's website?

What are three questions you still have about the circulatory system?

In your own words describe the circulatory system.

The Circulatory System is...

The circulatory system is made up of blood vessels that carry blood away from and towards the heart. 

How does our heart beat?

Why are our hearts important?

Your heart is sort of like a pump, or two pumps in one. It pumps blood around your body. Blood provides your body with the oxygen and nutrients it needs. It also carries away waste.

What types of blood vessels are in our circulatory system?

1. Veins
2. Arteries
3. Capillaries
4. All of the above

Arteries and Veins

Arteries carry blood away from the heart and veins carry blood back to the heart. 

What are the parts
of the heart?

Four Chambers of the Heart

The heart is made up of four different blood-filled areas, and each of these areas is called a chamber. 

There are two chambers on each side of the heart. 

One chamber is on the top and one chamber is on the bottom.

The two chambers on top are called the atria (say: AY-tree-uh). The heart has a left atrium and a right atrium.

The two chambers on the bottom are called the ventricles (say: VEN-trih-kulz). The heart has a left ventricle and a right ventricle. 

Why do you think the
Circulatory system
is important?

Why is the Circulatory System important?

The circulatory system carries oxygen, nutrients, and hormones to cells, and removes waste products, like carbon dioxide.

How do we keep our Heart Healthy?

Your challenge before next class is to come up with ideas of how to keep your heart healthy. 

What are things you can do to make sure you help your heart to do its job?