The Heart

Question 1

What heart structures prevent back flow of blood?

Answer 1

The four valves. Their function is to keep blood flowing in one direction by preventing back flow.

Question 2

What valve does blood pass through from the right atrium to the right ventricle?

Answer 2

The right atrioventricular valve, also known as the tricuspid valve, is located between the right atrium and right ventricle.

Question 3

What valve does blood pass through from the left atrium to the left ventricle?

Answer 3

Left atrioventricular valve, also known as the bicuspid valve, is located between the left atrium and left ventricle

Question 4

What valve does blood pass through from the right ventricle to the pulmonary trunk?

Answer 4

The pulmonary semilunar valve is located between the right ventricle and the pulmonary trunk.

Question 5

What valve does blood pass through from the left ventricle to the aorta?

Answer 5

The aortic semilunar valve is located between the left ventricle and the aorta.

Question 6

What are the three layers of the heart wall?

Answer 6

The heart wall has 3 layers:

● Epicardium: It’s the innermost serous membrane, the visceral pericardium. It is composed mainly of loose connective tissue.
● Myocardium: It is the heart muscle itself, composed of cardiac muscle cells. It is the thickest layer of the heart wall.
● Endocardium: It is the smooth epithelium (simple squamous) that lines the inner surface of the heart chambers. It’s in contact with the blood.