EASY
MEDIUM
HARD 5PTS
1

Which of the following best describes the primary function of the heart?

A. To control the body’s temperature through circulation
B. To send electrical signals to the brain for coordination
C. To pump blood throughout the body, delivering oxygen and nutrients and removing waste
D. To store oxygen and nutrients for future use

To pump blood throughout the body, delivering oxygen and nutrients and removing waste

1

The __________ returns deoxygenated blood from the upper parts of the body, while the __________ carries deoxygenated blood from the lower parts of the body to the right atrium.

A. pulmonary vein; pulmonary artery
B. inferior vena cava; superior vena cava
C. aorta; pulmonary vein
D. superior vena cava; inferior vena cava

D. superior vena cava; inferior vena cava

1

A. The heart pumps oxygen-rich blood from the left ventricle to the rest of the body.
B. Blood from the body enters the right atrium.
C. The oxygen-rich blood flows from the left atrium to the left ventricle.
D. Blood goes from the right atrium to the right ventricle and is sent to the lungs to get oxygen.
E. Oxygen-rich blood returns from the lungs into the left atrium.

B – Blood from the body enters the right atrium.

D – Blood goes from the right atrium to the right ventricle and is sent to the lungs to get oxygen.

E – Oxygen-rich blood returns from the lungs into the left atrium.

C – The oxygen-rich blood flows from the left atrium to the left ventricle.

A – The heart pumps oxygen-rich blood from the left ventricle to the rest of the body.

1

What is the main function of the right atrium in the heart?

A. It pumps oxygen-rich blood directly to the rest of the body
B. It receives deoxygenated blood from the lungs and sends it to the left ventricle
C. It receives deoxygenated blood from the body through the vena cava and sends it to the next chamber
D. It stores oxygen to be released during periods of physical activity

C. It receives deoxygenated blood from the body through the vena cava and sends it to the next chamber

1

After blood is oxygenated in the lungs, it returns to the heart through the __________.

A. aorta
B. vena cava
C. pulmonary veins
D. pulmonary arteries

C. pulmonary veins

1

After leaving the right atrium, where does blood flow next, and what happens to it?

A. It enters the left ventricle and is pumped to the entire body for circulation
B. It flows into the right ventricle, which pumps it to the lungs through the pulmonary artery for oxygenation
C. It moves directly to the brain through the carotid artery to receive oxygen
D. It enters the left atrium to be filtered by the lungs before reaching the tissues

B. It flows into the right ventricle, which pumps it to the lungs through the pulmonary artery for oxygenation

1

The __________ is the largest artery in the body and carries oxygenated blood from the left ventricle to the rest of the body.

A. aorta
B. pulmonary artery
C. vena cava
D. coronary artery

A. aorta

1

Which chamber of the heart receives oxygenated blood from the lungs and temporarily holds it before it is pumped to the rest of the body?

A. Right ventricle
B. Left atrium
C. Right atrium
D. Left ventricle


B. Left atrium

1

The heart contains four important __________ that ensure blood flows in one direction and prevent backflow.

A. valves
B. chambers
C. vessels
D. muscles

A. valves

1

Which chamber of the heart has the thickest walls because it pumps oxygenated blood into the aorta to supply the entire body?

A. Left ventricle
B. Right atrium
C. Right ventricle
D. Left atrium

A. Left ventricle

1

The valve located between the right atrium and the right ventricle that prevents the backflow of blood during ventricular contraction is the __________ valve.

A. bicuspid
B. aortic
C. pulmonary
D. tricuspid

D. tricuspid