An overview of digestive system in humans and digestive disorders

Type :

Term papers

Pages :

8 pages

Format :

.doc

Published date :

09/22/2009

Category :

Science & technology

Sub category :

Medical studies

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Summary :

Introduction
The alimentary canal
Buccal cavity
Description of teeth and tongue
Functions of the tongue
Description of pharynx, oesophagus, stomach, small intestine, large intestine and rectum
Digestive glands
1. Functions of salivary glands
Gastric glands
1. Functions of gastric juice
Liver
1. Functions of bile
Pancreas
1. Functions of pancreas
The intestinal glands
1. Functions of succus entericus
Summary of digestive physiology
Digestive disorders
1. Hyperacidity
2. Peptic ulcers
3. Jaundice
Types of jaundice
1. Hepatitic jaundice
2. Haemolytic jaundice
3. Obstructive jaundice (cholestatic )
Conclusion

Abstract

Digestion is the process of break down of (catabolic) complex organic macro molecules into simple assimilable micro molecules. This involves several biocatalysts called enzymes. Therefore digestion could also be said as the enzymatic hydrolysis of the food.The roof of the buccal cavity is the palate. At the posterior end of the soft palate there is a lose flap of tissue called the 'uvula' which closes the internal nostrils while the food is swallowed. On the floor of the buccal cavity there is a muscular organ called the 'Tongue'. On the upper and lower jaws there are hard biting structures called the teeth. There are also three pairs of salivary glands on the inside walls of the buccal cavity. These are hard, white, shining structures found on the upper and lower jaws. Since the teeth appear in two sets in humans it is called Diphyodont dentition. The teeth are located in sockets found in the jaw bones. So the dentition is also called Thecodont dentition.