Which structure serves to increase surface area for nutrient absorption?
A) A human's esophagus
B) An earthworm's crop
C) A shark's spiral valve
D) A bird's gizzard
E) A human's lacteals

Question

Quizplus · Accepted Answer

The spiral valve in a shark's intestine serves to increase surface area for nutrient absorption by increasing the length of the digestive tract. This allows for more time and space for nutrients to be absorbed into the bloodstream.

Which Structure Serves to Increase Surface Area for Nutrient Absorption