The circulatory systemThe body’s transportation network

Things you should know about the circulatory system

It consists mainly of the heart, blood vessels and blood

The heartThe heart is a four chambered pump that keeps

blood moving every minute of your lifeThe heart has valves that keep the blood moving

in the right direction

Three types of blood vessels arteries – carry blood away from the heartVeins- carry blood back to the heart; also

contain valvesCapillaries- exchange nutrients, waste, oxygen

and Carbon dioxide with the cells

Four main components of bloodRed blood cells (RBC) which carry OxygenWhite blood cells (WBC) which fight diseasePlatelets which help clot bloodPlasma which is the watery part of the blood

that dissolves nutrients and keeps the blood moving

There are four main blood groups A- contains A antigens but not BB- contains B antigens but not AAB- contains both A and B antigensO- does not contain A or B antigensBlood is further classified as Positive (+) or

negative (-) by the Rh antigen. + has the Rh factor, - does not.

Interactions The circulatory system works with the

respiratory system to deliver the Oxygen to the cells

The circulatory system works with the excretory system to filter out wastes from the blood

All systems rely on the circulation of blood for nutrients and oxygen.

specific things you can do to protect the health of your circulatory system.

Eat a balanced diet Participate consistently in aerobic exercisePractice stress management Avoid substance abuse (steroids, some allergy

medications, amphetamines, smoking, etc.)

The heartThe heart is a four chambered, muscular organ

that is responsible for providing the pumping power to move blood through the body.

The heart muscle is called myocardium and is made of cardiac muscle.

**On the pictures, right is left and left is right. (because it is from the perspective of being in your chest)

Circulation The heart is the

pump that circulates the blood to the body.

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I

J

What is meant by the “two loops” pattern of blood flow? Loop 1- heart to lungs and back to heartLoop 2- heart to body and back to heart

Three type of blood vesselsArteries- carry blood away from heart

Thicker, more smooth muscle tissueVeins- carry blood to heart

Has valves to prevent backflowCapillaries- nutrient/ waste- O2/ CO2 exchange

Blood- main partsRed blood cells-

carry oxygen

White blood cells- fight disease

Platelets- forms blood clots

Plasma- liquid: hydration

What is blood pressure?The pressure exerted outward by the blood on

the arteries

What is high blood pressure? (Hypertension)When the blood pressure gets over a normal

range and puts to much pressure on the system. Baseline pressure for hypertension is 140/90