1. Title: Anat & Phys 2/26/07 Objectives: Class Topics . Digestive System
12/5/2018
Title: Anat & Phys 2/26/07
Objectives: .
Class Topics
Digestive System
Teeth
Pharynx
Swallowing
Esophagus
Upper GI tract lab
"The pessimist sees difficulty in every opportunity. The optimist sees opportunity in every difficulty."
Winston Churchill
Wednesday, December 05, :13 PM

2. Class Assignments Upper GI tract lab 2/26/07
12/5/2018
Class Assignments
What
By When
Upper GI tract lab 2/26/07
Upper GI tract quiz 2/28/07
Due this class period
Due next class period
Due in the future

3. Coming up Feb 26 Feb 28 March 2 Complete notes of upper GI tract
12/5/2018
Coming up
Feb 26
Complete notes of upper GI tract
Upper GI tract lab
Feb 28
Upper GI tract quiz
Tour de Stomach
March 2
Complete Tour de Stomach
Notes – Stomach, comparative anatomy with respect to digestion of cellulose (test essay topic)

4. Teeth (per jaw) Incisors (4) Cuspids (2) Bicuspids (4) Molars (6)
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Incisors (4)
blade shaped - used to tear food
Cuspids (2)
Pointed teeth - used to tear food
Bicuspids (4)
2 points - used to tear and grind food
Molars (6)
4 points - used for grinding
Last set called wisdom teeth
Teeth (per jaw)
From:

5. Teeth 16 teeth per jaw - 32 total (adult) Children - 20 teeth
12/5/2018
Teeth
16 teeth per jaw - 32 total (adult)
Children - 20 teeth
decidious or primary
Covered in enamel (hardest material in the body) with dentin inside (second hardest material in the body)

6. From: http://www.sirinet.net/~jgjohnso/nutrition.html
12/5/2018
From:

7. From: http://www.sirinet.net/~jgjohnso/nutrition.html
12/5/2018
Pharynx
Common region for air and food
Nasopharynx
region of the nasal cavity and pharynx
Oropharynx
region of the oral cavity and pharynx
Laryngopharynx
region of the larynx and pharynx
From:

8. Swallowing 1. Form a bolus against hard palate
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Swallowing
1. Form a bolus against hard palate
soft palate raises to block nasopharynx
2. Epiglottis folds over trachea
3. Bolus pushed toward stomach through esophagus by parastaltic waves
takes 9 seconds to complete (average)
If too dry, secondary contractions push bolus down

9. From: http://www.sirinet.net/~jgjohnso/nutrition.html
12/5/2018
From:
From:

10. Esophagus 24-30 cm tube for transport
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Esophagus
24-30 cm
tube for transport
large folds in mucosa allow for a large bolus to pass
muscle tone keeps lumen shut
Sphincter at end called cardiac (lower esophagael) sphincter

11. Cardiac Sphincter Keeps material in stomach
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Cardiac Sphincter
Keeps material in stomach
heartburn - sphincter not closed
achalasia - sphincter doesn’t open
region of esophagael hernia

12. Upper digestive tract lab
12/5/2018
Upper digestive tract lab
Make sure you use bone snips and work back along the tongue
Get physical with the cat - watch for teeth though!