Question 18
Transport in AnimalsThe function of the fluid-filled pericadium is to
- A.reduce the friction caused by the pumping movements of the heart
- B.supply the heart with oxygen and nutrients
- C.prevent disease organisms from attacking the heart
- D.reduce the intensity of the pumping action of the heart.
Show the answer and explanation
Answer: A (reduce the friction caused by the pumping movements of the heart)
Explanation
The fluid between the layers of the pericardium works like a lubricant. It lets the heart beat without rubbing against the surrounding tissues.