Mouth

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The MOUTH is the starting point that begins the digestive process. The TONGUE is used for grasping the food, mixing, and swallowing. The TEETH tear and chew the feed into smaller particles that may be swallows. SALIVARYGLANDs: excrete saliva, which serves many purposes

Rectum is the terminal end of the large intestine and the entire digestive system -Water to moisten
-Macintosh lubricate
-Bicarbonates to buffer acids
-Enzyme amylase to
Breakdown carbs.
The ESOPHAGUS is the hollow muscular tube that leads from the mouth to the opening of the stomach. The STOMACH is a hollow muscle that contracts and relaxes to integrate digestive juices with the food causing it to breakdown. The SMALL INTESTINE is the next organ in the digestive system that is controlled by a sphincter muscle that helps move food into and through the tract. The small intestine is made up of three segments

1-Duodenum
2-Jejunum
3-Ileu.
t’d: Jejunum & Ileum…

VILLI
•Small fingerlike projections
•Increase surface area for absorption
•Absorb nutrients through membranes known as semi permeable membranes. •These membranes allow particles to pass through in a process.

DUODENUM
-First segment
-Use secretions from the pancreas and intestinal wall to break down protein, starch, and fats.

JEJUNUM & ILIUM:
-where absorption takes place
Absorption is the process which nutrients are passed from the intestine to the bloodstream. LARGEINTESTINE is the last organ of the digestive tract.
It contains two segments:
1-Cecum: is where fibrous food such as hay and grass is broken down into usable nutrients. 2-Colon: provides a storage space for waste from the digestive process, and is the largest part of the
Large intestine.
LARGEINTESTINE cont’d
A. Describe the major parts and functions of the digestive system

Rectum is the terminal end of the large intestine and the entire digestive system. The LARGEINTESTINE is the last organ of the digestive tract. It contains two segments:...
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