Digestive Syst

DIGESTIVE SYSTEM Digestive System, series of connected organs whose purpose is to break down, or digest, the food we eat. In the chemical phase, digestive chemicals called enzymes break apart individual molecules of food to yield molecules that can be absorbed and distributed throughout the body.

Digestion involves two phases: Mechanical phase : In the mechanical phase, teeth or other structures physically break down large pieces of food into smaller pieces.

Chemical phase : In the chemical phase, digestive chemicals called enzymes break apart individual molecules of food to yield molecules that can be absorbed and distributed throughout the body.

DIGESTIVE SYSTEM IN ANIMALS

ALIMENTARY CANAL • This canal has a mouth at one end, through which food is taken in, and an anus at the other end, through which digestive wastes are excreted. Muscles in the walls of the alimentary canal move the food along. Most digestive organs are part of the alimentary canal.

LIVER AND PANCREAS • These are located outside the alimentary canal. These organs contribute to chemical digestion by releasing digestive juices into the canal through tubes called ducts.

THE HUMAN DIGESTIVE SYSTEM

Human Digestive System • The human digestive system is consist of a series of organs and structures that help breakdown food and absorb nutrients for use throughout the body. Food enters the digestive system through the mouth and passes through esophagus, stomach, small intestine, large intestine and rectum. • Other organs such as liver further aids in breakdown of food, absorption of nutrients,

MOUTH

STOMACH

LIVER

SMALL INTESTINE

LARGE INTESTINE

PRESENTED BY:S. BIKARMJIT SINGH SCIENCE MASTER GOVT. SEN. SEC. SCHOOL KHASA BAZAR( AMRITSAR)