1. The lower chamber of the heart, that is, the ventricle with the thicker myocardium is the: a. Right                 b. Left 2. The pulmonic and aortic valves, which allow blood flow to the...

1. The lower chamber of the heart, that is, the ventricle with the thicker myocardium is the:

a. Right                 b. Left

2. The pulmonic and aortic valves, which allow blood flow to the pulmonary and systemic circulation, are open during:

a. Systole             b. Diastole

3. The large blood vessel that returns unoxygenated blood from the head and neck to the right atrium is called the:

a. Jugular vein                   c. Superior vena cava

b. Carotid artery               d. Inferior vena cava