4 The veins of the systemic blood. circuit carry blood, and the veins of the pul

Question

4 The veins of the systemic blood. circuit carry blood, and the veins of the pulmonary circuit carry a. oxygenated; deoxygenated b. oxygenated; oxygenated c. deoxygenated, deoxygenated d. deoxygenated, oxygenated 5 The pulmonary and aortic valves are known as the a. atrioventricular (AV) valves. b. semilunar valves. c. coronary valves. d. chordae tendineac. 6 The right and left coronary arteries are the first branches off the a. aorta. b. superior vena cava. c. pulmonary trunk. d. pulmonary veins. 7 Fill in the blanks: Cardiac muscle cells are also known as Adjacent cells are joined which allow the heart to together by

Explanation / Answer

Ans 4.d. deoxygenated; oxygenated. Veins carry deoxydenated blood from the body but pulmonary veins carry oxgented blood from lungs to heart.

Ans5.b. semilunar valves.  The aortic and pulmonic valves are known as the semilunar valves.

Ans6.a. aorta. The left and right coronary arteries branch off from the aorta.

Ans7.cardiomyocytes, intercalated disks, contract & expand.

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