A. capillary B. venule C. veins D. arterioles E. arteries 5. A. True B. False 6. B. venules C. arteries D. arterioles E. veins 7. B. reverses the flow of blood through the lungs to oxygenate the blood C. simulates the heartbeat D. activates the heart to restart its normal beat E. All of the above 9.
Peristalsis is A. production of saliva.
B. physical breakdown of starch. C. rhythmic contractions of the digestive tract. D. the opening of a sphincter. E. Two of the above 10. Digestion is the A. chemical and mechanical breakdown of food into small molecules.