Circulation Part 1 What the Heart Does

The heart pumps oxygenated blood through the body.

The heart also pumps blood filled with carbon dioxide

away from the body.

Oxygen is the gas we inhale.It gives life to all

the cells of the body.

Carbon dioxide is the gaswe exhale.

It is the waste product of breathing.

http://www.bbc.co.uk/schools/gcsebitesize/pe/appliedanatomy/0_anatomy_circulatorysys_rev1.shtml

Web Sites to Visit

Scroll to components of the circulatory/cardiovascular system and click on arrow.

Circulation Part 2 Inside the Heart

The heart is a muscle.It is called cardiac muscle.

The heart muscle contracts and relaxes.

When it relaxes, the heart fills with blood.

When it contracts, blood leaves the heart.

The inside of the heart is hollow.

The heart has four main sections.

The sections are called chambers.

The top chambers are called atrium.

The bottom chambers are called ventricles.

The atria are holding areas.

The ventricles are pumping areas.

You can see the muscle thatsurrounds the ventricles.

The muscles between the two sides of the heart

is called the septum.

Blood flows from the atrium to the ventricles.

Circulation Part 3 Blood Vessels

Blood vessels aretubes that hold blood.

There are 3 kinds of blood vessels.

Arteries usually hold oxygenated

blood.

Veinsusually hold blood

with carbon dioxide.

Capillariescan hold oxygen or CO2.

They connect arteries and veins.

Blood should always be insideof a blood vessel.

Bleeding is a sign that blood is not being contained.

Bleeding can occur inside oroutside of the body.

Bleeding should always be stopped.

Arteries always carry blood away from the heart.

http://www.bbc.co.uk/schools/gcsebitesize/pe/appliedanatomy/0_anatomy_circulatorysys_rev3.shtml

Web Sites to Visit

Please go to page 2 and view the diagram of the heart. Click views 1, 2, and 3.

Circulation Part 4 Blood

The Components of Blood

Plasma is the liquid part of blood.Plasma is yellow.It is mainly water

with some salt, sugar, and fat.

Red blood cellscarry oxygen to all the cells.

White blood cells fight infection.

Platelets stop bleeding.

Circulation Part 5 Aorta and Vena Cava

The right side of the heart holds blood with carbon dioxide.

The left side of the heart holdsblood with oxygen.

The aorta is a large artery.

It is located on the left side of the heart.

It carries oxygenated blood from the left side of the heart

to all the cells of the body.

Here is what the entire aorta looks like.

Usually you can’t see it because it is “hiding” behind the heart.

The vena cava is a large vein.

It is located on the right side of the heart.

It carries blood filled withcarbon dioxide

from the right side of the heartto the lungs so it can be exhaled.

http://www.bbc.co.uk/schools/gcsebitesize/pe/appliedanatomy/0_anatomy_circulatorysys_rev1.shtml

Web Sites to Visit

Please go to page 3 and view the animation blood vessels.

http://youtu.be/JA0Wb3gc4mE

Circulation Part 6 Pulmonary Artery

and Pulmonary Veins

The pulmonary artery bringsblood filled with carbon dioxide

from the heart to the lungsto be exhaled.

The pulmonary artery is the only artery that

carries blood with carbon dioxide.

The pulmonary veins bringblood filled with oxygen

from the lungs to the heart

The pulmonary veins are the only veins that

carries blood with oxygen.

Web Sites to Visit

http://www.pbs.org/wnet/redgold/journey/circulation.swf

Please view systemic and pulmonary circulation.

http://www.wisc-online.com/Objects/ViewObject.aspx?ID=AP12704

There is a short quiz at the end of these animations.

The End