Transcript Digestive System

Digestive System
1.
2.
3.
4.
Mouth
Esophagus
Stomach
Small
Intestine
5. Large
Intestine
6. Rectum
7. Anus
Types of Digestion
1. Mechanical – chewing or Mastication
2. Chemical
• 1. Mechanical – chewing and cutting food
• 2. Salivary Glands
Saliva Flow
• 1. Smell
• 2. Sight
• 3. Taste
Bolus and Peristalsis
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1. Two layers of muscle in the esophagus
2. Three layers of muscle in the stomach
3. Hydrochloric acid found in the stomach
4. Pyloric valve found at end of stomach
Lining of the Small Intestine
Large Intestine
Large Intestine - Colon
• 1. Removes water from non-digestible
food
• 2. About as long as you are tall, five to six
feet on average and about two inches in
diameter which is why it is called large.
The small intestine is about one inch in
diameter
Rectum
• 1. Stores the solid wastes
Proper Terminology
• 1. The removal of solid wastes through the
anus to outside of the body is called
Defecation
• 2. The elimination of liquid wastes through
the penis to outside the body is called
Urination
Time of Digestion
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Esophagus – 5 to 6 seconds
Stomach - 2 to 4 hours
Small Intestine – 5 to 6 hours
Colon or L.I. – 12 to 24 hours
Time from entering one end to leaving the
other end probably ranges from 20 to 30
hours