Coursework.Info - Inspiration in an Instant

On the left is an image preview of every page of this document, and below are the first 150 words with formatting removed:

Animal Physiology: Digestive system of a rat Introduction Plants and animals are composed of many different types of complex organic molecules. When eaten as food, these molecules are too large to be simply absorbed into an animal's body. For food to be absorbed, the molecules must be small enough to pass into the cells lining the gut. This is the purpose of digestion. Digestion is the process of breaking down organic food into molecules that are small enough to enter cells. Chemical digestion involves enzymes that break complex molecules into simpler molecules Mechanical digestion is the physical breakdown of food into smaller pieces, to increase the surface area available for enzyme action. Unlike chemical digestion, it does not chemically change the molecules. The mammalian digestive system consists of the mouth, oesophagus, stomach, small intestine, large intestine, rectum, anus and associated glands. Aim To locate, identify and describe the digestive tract of a...

Get instant access

• Instant, unlimited access to our documents in full
• Swap your work for free access, or pay £4.99
• To see the full version of this document and 145,970 others

OR

Receive email updates for this category

• Simply tell us your email address and receive a weekly Study Help Email for FREE
• Receive 3 FREE essay views with each email
• Get all the latest essays from Coursework.Info & discussion from TheStudentRoom.co.uk