What is a function of the parts labeled A and B in the image below?
A) They help propel food along the gastrointestinal tract.
B) They secrete enzymes into the lumen of the gastrointestinal tract that digest ingested food substances.
C) They secrete hormones into the bloodstream.
D) They facilitate the transfer of absorbed nutrients to the blood.
E) They hold the digestive system in place.

Question

What is a function of the parts labeled A and B in the image below? 
A) They help propel food along the gastrointestinal tract. 
B) They secrete enzymes into the lumen of the gastrointestinal tract that digest ingested food substances. 
C) They secrete hormones into the bloodstream. 
D) They facilitate the transfer of absorbed nutrients to the blood. 
E) They hold the digestive system in place.

Quizplus · Accepted Answer

The Answer is A

What Is a Function of the Parts Labeled a and B