The spiral valve in the intestine of a shark serves to
A)release strong acids to aid digestion.
B)function as a liver in producing bile salts.
C)entrap food molecules in a mucus strand.
D)slow passage of food and increase absorptive surface area.
E)propel food through the tract at a faster rate.

Question

Quizplus · Accepted Answer

The spiral valve in the intestine of a shark slows the passage of food and increases the absorptive surface area, allowing for efficient digestion and nutrient absorption in the relatively short digestive tract of the shark.

The Spiral Valve in the Intestine of a Shark Serves