Layers of the heart

Question 1

Visceral layer of serous pericardium
Comprised of mesothelial cells and fat and connective tissues

Answer 1

Epicardium

Question 2

Muscle layer
Comprised of cardiomyocytes

Answer 2

Myocardium

Question 3

Lines inner surface of heart chambers and valves
Comprised of a layer of endothelial cells, and a layer of subendocardial connective tissue

Answer 3

Endocardium

Question 4

What ensures one way flow through the heart

Answer 4

The two sets of valves

Question 5

Explain the look of myocardial muscle cells

Answer 5

Branches, single nucleus, attached by intercalated disks

Question 6

What are the two sets of valves that ensures on way flow in the heart?

Answer 6

Atrioventricular and semilunar vales

Question 7

Where are the atrioventricular valves located

Answer 7

between the atria and ventricles

Question 8

What is the role of the chordae tendineas in the atrioventricular vales

Answer 8

prevent eversion during ventricular contraction

Question 9

What is the chordae tendinae attached to the

Answer 9

valve flaps from papillary muscles in the atrioventricular valves

Question 10

What are the names for the atrioventricular valves and location

Answer 10

Tricuspid valve on the right side
Bicuspid valve (mitral valve), on the left side

Question 11

Semilunar location and the two types

Answer 11

Between ventricles and arteries

Aortic valve
Pulmonary valve

Question 12

What happens with the AV valves during ventricular contraction?

Answer 12

Remain closed to prevent backward flow of blood into the atria

Question 13

What is the function of the semilunar valves

Answer 13

Prevents blood that has entered the arteries from flowing back into the ventricles during ventricular relaxation