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Heart LO

T or F: All arteries carry de-oxygenated blood.

True

T or F: Phase one of the heart takes blood from the lungs to the heart and then back to the heart.

False

You are located in your foot. Travel to and through the right side of your heart, and pick up oxygen.

Foot, Vein, Inferior Vena Cava, Right Atrium, Tricuspid Valve, Right Ventricle, Pulmonary Valve, Pulmonary Artery, Lungs

4 functions of the circulatory system

Carries little oxygen away from cells, Carries needed substances to cells, fights diseases, Takes away wastes

List the materials the CVS will deliver to the body.

Glucose and Oxygen

What waste is removed by the CVS? Where is this waste removed from the body?

Carbon-dioxide. Lungs

Define "heart"

A hollow muscular organ that pumps blood throughout the body

Where is your heart located?

Behind the sternum in the ribs

How is the heart protected?

The sternum and ribs form a cage around the heart protecting it from damage

What seperates the right side of your heart from the left side?

Septum

The two upper chambers of your heart are called

Atriums, auricles, or atria

Whats the difference between these two chambers?

The right atrium has oxygen poor blood and the left atrium has oxygen rich blood

Where does the blood come from in the upper right chamber? What blood vessels put blood into these chambers?

Upper Body. Superior Vena Cava, Inferior Vena Cava

The lower right/left chambers are called

Right ventricle, Left ventricle

Whats the difference between the lower chambers?

The right ventricle has oxygen poor blood, left ventricle has oxygen rich blood. The left ventricle puts more force than the right ventricle because it pumps blood through the body.

What is the tip of your heart called?

apex

Pacemaker

group of heart cells that sends out signals that make the heart muscle contract.

Artery

blood vessel that carries blood away from the heart

Capillary

where substances are exchanged between body and blood cells

Vein

blood vessel that carries blood to the heart

Where do blood vessels run?

All the tissues of our body

How does the blood vessel size range?

Width of thumb to hair

How many times can our blood vessels stretch around the earth?

Twice

In what order do blood vessels go in?

Artery, Arteriole, Capillary, Venoule, Vein

T or F: Blood enters the heart through the atria, auricle, or atrium

False

T or F: All capillaries have in them oxygenated blood

True

Why is the left side of the heart weaker than the right side?

It isnt

Coronary Arteries

1st branches of Aorta

Inner artery layer

smooth epithelial tissue

Middle artery layer

mostly muscle tissue

Outer artery layer

flexible connective tissue

What causes your pulse?

Expansion and Relaxation of artery wall

What artery layer acts as an control gate?

muscle layer. It relaxes to organs that need a lot of blood and contracts to organs that need little

How thick are capillaries?

One cell

Where are capillaries located?

Around every cell in the body

What happens to the oxygen level as it flows down the arteries in the body.

It lowers

Why should you not exercise vigorously shortly after eating?

After you eat, your digestive system needs more blood. If you exercise vigorously, more blood flows to the skeletal muscles, which means your food may not be digested properly.

Name the three factors that enable flodd to return to your heart?

Contraction of skeletal muscles, Larger veins have valves, Breathing pressure

T or F: Veins are larger than arteries

False

What is blood pressure?

The force exerted in a specific area

What causes bp?

force of ventricles contracting

Why is blood pressure lower in leg veins than the aorta?

Blood pressure near the heart is highest

What instruments measure bp? How is it measured? How is it expressed?

sphygmomonameter and stethoscope. A cuff is wrapped around the upper arm air is pumped until blood flow in the artery is cut off then releases listens to the pulse and records two numbers. In mm as a fraction a healthy bp is 120/80 or lower.

List two diseases of the CVS

atherosclerosis and hypertension

Atherosclerosis

a condition in which an artery wall thickens as the result of the build up of fatty materials

Heart attack

when blood flow to the heart muscle is blocked

What causes a heart attack

artherosclerosis in the coronary arteries

Hypertension

High-blood pressure

What are the effects of hypertension?

makes heart work harder to pump blood, damages the walls of blood vessels

Why is hypertension called the silent killer?

There are no obvious symptoms

white stuff on a cut

lymph

3 ways to maintain CV health

Exercise regularly, eat a balanced diet low in saturated/trans fat, sodium, and cholesterol, and avoid smoking

Foods that are high in cholesterol

Red meat, Eggs, Cheese

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