1. The large blood vessel that returns unoxygenated blood from the head and neck to the right atrium is called the: a. Jugular vein b. Carotid artery c. Superior vena cava d. Inferior vena cava 2. The...

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

a. Jugular vein

b. Carotid artery

c. Superior vena cava

d. Inferior vena cava

2. The right coronary artery branches supply oxygenrich blood to a portion of the:

a. Electrical conduction system

b. Left circumflex arteries

c. Sympathetic nervous system

d. Coronary sinus