Heart and Blood Flow 1

Cardiac System

By R. Marsh Ph.D.

Label your Heart:

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In order of Blood Flow- through the valves)

Mnemonic:

T - Toilet .....................T - Tricusped

P - Paper..................... P - Pulmonary

M - My ..........................M - Mitral

A - A ** Hole​ ..............A - Aortic

1. Blood move from the VENA CAVA to the RIGHT ATRIA

2. SA NODE fires- causes ATRIA to contract​

3. ATRIA squeezes blood through the TRICUSPED valve into the right VENTRICLE

4. ELECTRICAL impulse travels from SA NODE - TO THE AV NODE (small delay) then travels through BUNDLES OF HIS - L/R BUNDLE BRANCHES and CONTRACTS the VENTRICLES

5. R. VENTRICLE contract - blood moves the PULMONARY VALVE/PULMONARY ARTERY TO THE LUNGS where it gets oxygenated.

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6. Oxygenated blood returns via the PULMONARY VEIN TO THE LEFT ATRIA.

7. SA NODES FIRES - causing the ATRIAS to contract - Blood moves from L. ATRIA through the MITRAL VALVE into the LEFT VENTRICLE

8. Electrical impulse travels from SA NODE - AV NODE (small daely) then travels through the BUNDLES OF HIS - L/R BUNDLE BRANCHES and CONTRACTS the VENTRICLES​

​9. L. VENTRICLE contracts - moves blood through the AORTIC VALVE into the AORTA where it then moves to the BODY and returns back to the VENA CAVA (step 1)

Multiple Choice

The heart is made of which of the following types of muscles?

• Cardiac muscle

• Striated muscle

• Smooth muscle

• None of the above

Multiple Choice

Your heart always pumps at the same rate.

• True

• False

Multiple Choice

Electricity cause your muscles to contract.

• True

• False

Multiple Choice

The pulmonary artery is the artery that carries the blood to your heart from your lungs.

• True

• False

Multiple Choice

How are arteries and veins different?

• One is bigger than the other.

• The arteries carry more blood than the veins.

• The arteries carry blood away from the heart while veins carry blood to the heart.

• The veins carry blood away from the heart while arteries carry blood to the heart.

Multiple Choice

Unoxygenated blood enters the right atrium from the top of the heart.

• inferior vena cava
• superior vena cava
• aorta

Multiple Choice

Name of the valve that separates right atrium from right ventricle.

• tricuspid
• aortic
• mitral

Multiple Choice

Valve that blood is forced through from right ventricle into pulmonary arteries.

• pulmonary valve
• aortic valve
• mitral valve

Multiple Choice

Name of the valve that separates left atrium from left ventricle.

• mitral valve
• tricuspid
• pulmonary valve

Multiple Choice

Major artery at the top of the heart sends oxygenated blood from the left ventricle to the rest of the body.

• aorta
• pulmonary artery
• inferior vena cava