Digestive Physiology.ppt - Human Digestive System Ms Reshma Parveen 1 Give and explain the functions of the digestive system 2 Name and give the

Digestive Physiology.ppt - Human Digestive System Ms Reshma...

This preview shows page 1 - 8 out of 21 pages.

Human Digestive System Ms. Reshma Parveen
2. Name and give the functions of the different digestive organs. 3. Describe how some accessory organs and glands aid the body in the digestion process. 4. Explain the process of digestion. 1. Give and explain the functions of the digestive system.
1. Ingestion : process of eating 2. Propulsion : passing of food down the GI tract • swallowing : voluntary • peristalsis : reflex, involuntary, involves alternating contractions of muscles in body walls of GI organs 3. Mechanical digestion • prepares food for chemical digestion • includes chewing, mixing with saliva by tongue action, churning in stomach... 4. Chemical digestion • catabolic steps in which food is broken down to basic building blocks • accomplished by enzymes in digestive juices 5. Absorption : passage of food particles into the blood-lymph 6. Defecation : elimination of indigestible food substances Processing of food by the Digestive System involves 6 basic
Parts of Human Digestive System Main Parts Mouth Esophagus Stomach Small Intestine Large Intestine Accessory Parts Liver Pancreas Gallbladder Salivary Gland
Main Parts of Digestive System
Mouth There two major processes which take place: Mastication (Chewing): - Breaks down large food molecules. - Increases surface area of food particles. Secretion of Saliva: - Contains salivary amylase (ptyalin) that digests starch to maltose.

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture