Answer:
Peristalsis is defined as the involuntary movement which involves contraction and relaxation of muscles present in the digestive tract originates from the esophagus.
In diarrheal condition the Peristalsis movement does not take place properly as it is not a voluntary muscle movement so it can not be controlled consciously. it is important to digestion but, in case of diarrhea or constipation something goes haywire with peristalsis . this condition can also be defined as motility (hypermotility) disorder.
