The Circulatory The Circulatory SystemSystem

Warm UpWarm Up Write down three things you can do Write down three things you can do

to keep your heart healthyto keep your heart healthy

The Circulatory SystemThe Circulatory System This system carries This system carries

food and oxygen to food and oxygen to all the cells of the all the cells of the body.body.

It is made up of the It is made up of the heart, blood & heart, blood & blood vessels.blood vessels.

The Circulatory has 2 big jobs The Circulatory has 2 big jobs Big job # 1Big job # 1 – – Carrying Food, Carrying Food,

Water, & OxygenWater, & Oxygen. . The circulatory system was the The circulatory system was the

awesome task of delivering the awesome task of delivering the necessary “goods” the cells. It’s a bit necessary “goods” the cells. It’s a bit like the pizza delivery person.like the pizza delivery person.

Big Job #2Big Job #2 - -Removing Wastes from Removing Wastes from the cellsthe cells. .

In our everyday activities we create In our everyday activities we create waste. The wastes cannot stay in the waste. The wastes cannot stay in the cells. They would build up and prevent cells. They would build up and prevent the cells from doing their job. the cells from doing their job.

The circulatory system carries the The circulatory system carries the waste to other parts of the body where waste to other parts of the body where they are removed from the bodythey are removed from the body

The HeartThe Heart The heart is a muscle The heart is a muscle

and its job is to pump and its job is to pump blood to all of the cells blood to all of the cells in your body.in your body.

The heart is the The heart is the strongest muscle in the strongest muscle in the human bodyhuman body

It pumps the blood to It pumps the blood to your brain cells, your brain cells, nerves, and bone nerves, and bone cells.cells.

It pumps 24 hours a It pumps 24 hours a day without a break.day without a break.

FACTS ABOUT HEARTFACTS ABOUT HEART The Heart is about the size of your fist and The Heart is about the size of your fist and

is located in the middle of your chest, is located in the middle of your chest, slightly to left.slightly to left.

Its upper chambers are the right atrium Its upper chambers are the right atrium and left atrium. The lower chambers are and left atrium. The lower chambers are the right ventricle and the left ventricle.the right ventricle and the left ventricle.

AArteries pump oxygenated blood to your rteries pump oxygenated blood to your body; body; aaway from heartway from heart

Veins carry deoxygenated blood back to Veins carry deoxygenated blood back to the heart and then to the lungs.the heart and then to the lungs.

TermsTerms Red Blood Cells-Red Blood Cells-

Carry oxygen & Carry oxygen & carbon dioxide to & carbon dioxide to & from the lungs. from the lungs. Produced in the Produced in the bone marrow.bone marrow.

White Blood Cells-White Blood Cells- Destroy bacteria Destroy bacteria and are produced and are produced in the spleen.in the spleen.

TermsTerms Blood Platelets-Blood Platelets- Aid blood in clotting Aid blood in clotting

to help stop bleeding.to help stop bleeding. PlasmaPlasma- Liquid part of blood. About - Liquid part of blood. About

90% water90% water Blood is made up of 45% cells and Blood is made up of 45% cells and

55% plasma55% plasma

REVIEWREVIEW How is the circulatory system similar How is the circulatory system similar

to a paper boy?to a paper boy? How big is your heart and were is it How big is your heart and were is it

located?located? What blood vessels carries blood to What blood vessels carries blood to

your cells, away from your heart?your cells, away from your heart? What blood vessels carries blood What blood vessels carries blood

back to your heart?back to your heart?

Review continued…Review continued… Aid in blood clotting?Aid in blood clotting? Which blood cells carry oxygen and Which blood cells carry oxygen and

carbon dioxide to and from the lungs?carbon dioxide to and from the lungs? Which blood cells destroy bacteria and Which blood cells destroy bacteria and

where are these cells produced?where are these cells produced? What is the liquid part of blood called?What is the liquid part of blood called? Name 3 parts of the circulatory system.Name 3 parts of the circulatory system. Name 3 blood vessels.Name 3 blood vessels.

CapillariesCapillaries Capillaries are extremely small Capillaries are extremely small

vessels located within the tissues vessels located within the tissues of the body that transport blood of the body that transport blood from the arteries to the veins. from the arteries to the veins.

FLOW OF BLOOD THROUGH FLOW OF BLOOD THROUGH THE HEARTTHE HEART

Superior Vena Cava (vein) = carries blood Superior Vena Cava (vein) = carries blood to heartto heart

Right atrium (deoxygenated)Right atrium (deoxygenated) Right ventricle (deoxygenated)Right ventricle (deoxygenated) Pulmonary arteryPulmonary artery Pulmonary vein Pulmonary vein Left atrium (oxygenated)Left atrium (oxygenated) Left ventricle (oxygenated)Left ventricle (oxygenated) Aorta (artery) = carries blood away to bodyAorta (artery) = carries blood away to body