1. The Heart2. Three types of blood

vessels3. What’s in blood

4. How the systems work together

The human heart is a muscular pump composed of cardiac muscle for rhythmic contraction.Cardiac muscle is a involuntary muscle, meaning it does not need to be told to contract.It is located in the middle of your chest right behind the sternum and just to the left. It is the size of your fist.

4 chambers Upper = atria Lower = ventricles

Blood flows ONE way – from atrium to ventricle Valves prevent blood from flowing the wrong way

The right side of the heart receives deoxygenated blood from around the body.

The right side pumps blood through an artery (pulmonary artery) into the lungs to re-oxygenate it.

The left side of the heart receives oxygenated blood from the lungs.

The left side pumps blood through an artery (aorta) throughout the body by way of veins, arteries, and capillaries.

Arteries Carry blood out of the heart

Elastic (stretchy)

Must be strong to withstand heart’s force

Veins Carry blood IN

to the heart Thin and not

very elastic VALVES to

keep the blood moving to the heart

Capillaries One-cell thick Connect arteries

and veins Site of exchange

of materials (nutrients, messages, etc)

Capillaries

ArteriesVeins

Capillaries come in close contact

with every cell in

the body

capillary

capillaries

Red Blood cells

Carry oxygen and carbon dioxide with help from a chemical called hemoglobin

White Blood cells

Fight germs and diseases that enter the body

Platelets

Gather at the site of a wound to form a clot to prevent bleeding to death

Plasma

Liquid part of blood; carries cell wastes, nutrients, hormones

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Your blood type is established before you are BORN, by specific GENES inherited from your parents.

You inherit one gene from your MOTHER and one from your FATHER.

These genes determine your blood type.

Blood Transfusions

A blood transfusion is a procedure in which blood is given to a patient through an intravenous (IV) line in one of the blood vessels.

Blood transfusions are done to:-Replace blood lost from injury/illness-Different types of cancer treatments-Supplement blood for people who cannot make enough of their own

Who can give you blood?

People with TYPE O blood are called Universal Donors, because they can give blood to any blood type.

People with TYPE AB blood are called Universal Recipients, because they can receive any blood type.

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Universal Donor

Universal Recipient

Circulation Assignment

1. What are the four components of blood? What is the purpose of each?

2. What is the percentage of each component in a drop of blood?3. I have a low platelet count in my blood, should I be worried?

Why?4. What four other things does blood sometimes carry?5. What does lub-dub mean? Describe each sound.6. Once deoxygenated blood enters the heart where is it headed

next?7. What does the right side of the heart do?8. What are the 8 blood types? Which is the most rare type in

Canada?9. What does universal donor/universal receiver mean?10.What is a blood transfusion?11.I am 0-, should I be worried about accidents, illness, etc? Why?

Circulation with Muscular Smooth

muscles make the blood vessels

Cardiac muscle makes the heart

Circulation with Skeletal Bone

marrow inside of some bones makes blood cells

Circulation with Digestive The

circulatory system carries the nutrients around the body to all cells