Skeletal and Cardiovascular Systems Quiz

What prevents blood from flowing back into the atria when the ventricles contract?

• semilunar valves

• sinoatrial node

• atrioventricular node

• tricuspid and bicuspid valves

When blood leaves this chamber of the heart, it heads out to the body (not the lungs)

• left atrium

• right atrium

• left ventricle

• right ventricle

This initiates the action potential that causes the heart to beat

• Inferior vena cava

• Atrioventricular node (AV node)

• Superior vena cava

• Sinoatrial node (SA node)

These carry blood towards the heart

• arteries

• veins

Why is coronary circulation necessary?

• because blood needs to be pushed throughout the entire body

• because the heart itself needs nourishment

• because the scalp requires an exceptional amount of nourishment

LARGEST ARTERY:

• ARTERIOLE

• AORTA

• AORTA CAVA

PERICARIDUM:

• OUTER LAYER OF HEART

• MIDDLE LAYER OF HEART

• INNERMOST LAYER OF HEART

• SAC THAT SITS AROUND THE HEART FOR PROTECTION

MYOCARDIUM

• OUTER LAYER OF HEART

• MIDDLE LAYER OF HEART

• INNERMOST LAYER OF HEART

SEPTUM:

• DIVIDES HEART FROM SUPERIOR TO INFERIOR

• KEEPS BLOOD FLOWING FORWARD

• DIVIDES HEART MEDIALLY

Label the chambers of the heart

a

b

c

d

Right Atrium

Left Ventricle

Left Atrium

Right Ventricle