Question

________ is due to contraction of the muscularis externa to propel materials through the digestive tract. ____________ are powerful contractions of the stomach and intestinal muscularis externa. __________ are contraction cycles in the small intestines to churn and fragment the bolus and mix it with intestinal secretions. __________ are strong peristaltic contractions that occur in response to stomach and duodenum distension to push fecal material from the transverse colon toward the rectum.

Answer 1

1. Digestion : The break down of insoluble food material in to soluble material is called as digestion. The digestive system consists of gastrointestinal tract and the accessory organs which include liver, pancreas, and gall bladder. There are two types of digestion process takes place they include mechanical and chemical digestion.

Mechanical digestion begins the mouth and chemical digestion occurs from the mouth to the intestine. The majority of the chemical digestion occurs in the small intestine.

Peristalsis is due to contraction of the muscularis externa to propel materials through the digestive tract. Peristalic waves are powerful contractions of the stomach and intestinal muscularis externa. segmentation are contraction cycles in the small intestines to churn and fragment the bolus and mix it with intestinal secretions. Mass movements are strong peristaltic contractions that occur in response to stomach and duodenum distension to push fecal material from the transverse colon toward the rectum.