Chapter 22 - The Cardiovascular System

Question 1

Endocardium

Answer 1

A membrane lining the heart’s interior wall.

Question 2

Myocardium

Answer 2

Thick, strong muscles making up the middle layer.

Question 3

Epicardium

Answer 3

The thin outer layer of the cardiac wall.

Question 4

Fibrous Pericardium

Answer 4

The outermost layer anchors the heart.

Question 5

What is the function of the pericardial cavity?

Answer 5

Acts as a lubricant and reduces friction between layers of the heart.

Question 6

What is function of the fibrous pericardium?

Answer 6

Anchors the heart in the mediastinum and prevents overfilling.

Question 7

What is the function of the cardiac valves?

Answer 7

Allow blood to flow in one direction only.

Question 8

What is the function of the capillaries in the circulation system?

Answer 8

Exchange nutrients and waste.

Question 9

Why does the heart muscle need its own blood supply?

Answer 9

To provide oxygen and nourishment to the heart tissue.

Question 10

How does oxygenated blood enter systemic circulation?

Answer 10

During ventricular contraction, the blood exists in systemic circulation through the aorta.