THE CIRCULATORY SYSTEMEmily Templeton

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NICE TO MEET YOUHello! My name is Dr.T! I

am a body systems specialist! I will be helping

you learn all about the circulatory system! I will

be sharing my thoughts on every page, so be on a

lookout for them! I hope you’re ready, you’ll be a specialist too before you

even know it!

Before I forget, be sure to use the

navigation buttons if you need them! They can help you move throughout

the lesson!

THE CIRCULATORY SYSTEM

Blood Vessels

Heart

Blood

The main organ for this body system is the heart.

THE CIRCULATORY SYSTEM

The circulatory system is a system that works to bring oxygen and nutrients to body cells and takes away carbon dioxide and wastes.

At the center of the circulatory system is the heart!

The C.S. keeps your

blood moving!

THE HEART

The heart pumps blood through your blood vessels to all parts of your body.

The heart is strong and works all the time!

The heart is divided into 4 chambers. The two upper chambers are called the

left atrium and right atrium. They bring blood from the veins.

The lower chambers are called the left and right ventricle. They pump blood to the body.

The atriums are at the top of the

heart, think Atriums/

Attic!

THE HEART This is what your heart really looks

like!

THE HEART

The heart is a powerful muscle in your chest. It is about the size of your fist.

The heart muscle is different that other muscles ,because it never gets tired.

Who would have

thought your heart was that strong?

HEART VALVES

The heart has heart valves that open in one direction.

This keeps the blood that is carrying fresh oxygen into the body from mixing with the blood carrying carbon dioxide.

Heart valves are kind of like traffic controllers. They

make sure everything keeps

moving in the right direction.

HEART VALVES

The heart pumps blood through your body to deliver oxygen and take away wastes like carbon dioxide.

While this is going on, the right atrium also fills with blood that has been through the body and is filled with wastes like carbon dioxide. It needs to go to the lungs. Heart valves

have a very important

job pumping blood.

BASICS ABOUT BLOOD

Blood is made up of several parts The liquid part is called the plasma. Red blood cells carry oxygen and

carbon dioxide through the body. White blood cells help the body to fight

germs. Platelets help the blood to form clots

and heal cuts.The reason blood is

red is because it's got iron in it. If you look

down a microscope at blood, what you'll see are thousands of tiny little red cells that are

referred to as bi-concave discs.

BLOOD

Blood travels through the body through blood vessels

There are 3 main types of blood vessels An artery is a blood vessel that carries

blood away from the heart. Arteries are the largest blood vessels in the body.

The smallest blood vessels are called capillaries. They are so small that only one cell can pass through at a time.

Veins are the other types of blood vessels. They carry blood to the heart.

Did you know your blood looks

blue sometimes?

TO SUM IT UP…

The right ventricle’s blood without oxygen goes to the lungs.

The left ventricle with fresh blood is ready to go through the body.

YOUR BLOOD CIRCULATES THROUGH YOUR BODY IN ONE MINUTE!!!!!

The circulatory

system keeps you alive and is constantly

working!

LET’S SEE WHAT YOU REMEMBER!

What is the main organ of the circulatory system?

Heart Lungs Stomach Blood Skull

You’re so smart, the

heart!Keep it up!

LET’S SEE WHAT YOU REMEMBER!

What take the blood away from the heart?

Atrium Arteries Veins

You guessed it,

the arteries!Awesome

job!

LET’S SEE WHAT YOU REMEMBER!

How many chambers is the heart made up of?

5 3 4 2

That’s right, 4! Way to

go!

EXTRA PRACTICE

http://kidshealth.org/PageManager.jsp?lic=1&article_set=59357&cat_id=20607

Need some extra

practice? Try this quiz!

RESOURCES

OGCE Heart PPT 4th Grade Science Book http://

kidshealth.org/kid/htbw/heart.html http://

kids.discovery.com/tell-me/science/body-systems/your-cardiovascular-system

Images- Microsoft ClipArt