GIT - Gastro-intestinal Tract - Focus Dentistry

GIT – Gastro-intestinal Tract

Gastro-intestinal Tract

Mouth
Pharynx
Esophagus
Stomach
Small intestine
Large Intestine
Rectum

Gastro-int-1

Function of GIT

Ingestion of food

Digestion
- mechanical digestion of food particles
- breaks up food particles

Motility
- movements of organs and food
- mechanical digestion of food particles

Secretion
- secretion of digestive juices
- chemical digestion of food particles

Absorption
- absorption of digestion products to blood or lymphatic vessels

Storage and Elimination
- non-digested food particles

Protective function – mechanical, chemical, immunological
- not only GIT organs but also the body as a whole, against the potential harmful food components

Phases of Digestion

The GI tract can be divided into four concentric layers in the following order:

Most common disorders of GIT

Motor dysfunction of smooth muscle of the individual parts of the digestive system

Indigestion of food and absorption of nutrients - malabsorption syndrome

Bleeding into the individual parts of the digestive tract

Perforation of the wall of the digestive system with subsequent leakage of the contents to the peritoneal cavity

Obstruction in moving of the contents of one part of the digestive system to the next section

Circulation disorders in the wall of the individual parts of the digestive system

MCQS WITH ANSWERS

Which cranial nerves are involved in normal functioning of the gastrointestinal tract?

a) II
b) IV
c) VI
d) X

Answer: D

The vagus nerve is extensively important for swallowing, gastric acid secretion and motility.

Click here to view QA and Description for Gastro-intestinal Tract