Question

1. The left atrioventricular valve, or ____________, prevents backflow of blood into the left atrium when the left ventricle is contracting.

1. tricuspid valve
2. bicuspid valve
3. left ventricle valve

2. The heart is enclosed in a double-walled sac called the:

1. Pericardium
2. Apex
3. Mediastinum

3. The chambers of the heart are the following except:

1. Valves
2. Ventricles
3. Atria

4. The right ventricle discharges blood into the ____________, which carries blood to the lungs, where the blood unloads carbon dioxide and picks up oxygen.

1. Aorta
2. Pulmonary trunk
3. Vena cava

5. Blood flows through the heart in one direction - from the atria to the ventricles.

1. True
2. False

6. Which of the following walls of the heart is the middle and thickest layer?

1. Epicardium
2. Myocardium
3. Endocardium

7. In the heart, the _________ ventricle has thinner walls.

1. right
2. left

8. The heart serves as a double pump. The right side serves as the ______________ pump, shunting carbon dioxide-rich blood to the lungs.

1. Pulmonary circuit
2. Systemic circuit
3. Coronary circuit

9. The blood vessels that supply blood to the heart itself are the:

1. vena cava
2. carotid arteries
3. coronary arteries

10. The ______________ valves are located between a ventricle and a great vessel:

1. semilunar
2. atrioventricular
3. tricuspid

Answer 1

1.The left atrioventricular valve, or tricuspid valve, prevents backflow of blood into the left atrium when the left ventricle is contracting.

2.The heart is enclosed in a double-walled sac called the: Pericardium.

3.The right ventricle discharges blood into the Pulmonary trunk, which carries blood to the lungs, where the blood unloads carbon dioxide and picks up oxygen.

4.Which of the following walls of the heart is the middle and thickest layer?

-Myocardium

5.In the heart, the right ventricle has thinner walls.

6.The heart serves as a double pump. The right side serves as the Pulmonary circuit pump, shunting carbon dioxide-rich blood to the lungs.

7.The blood vessels that supply blood to the heart itself are the:coronary arteries.

8.The atrioventricular valves are located between a ventricle and a great vessel.