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1. Digestive System Ingests, digests, absorbs, and eliminates waste
2. Primary purpose break down large pieces of food into small particles suitable for absorption
of digestive sys-
tem is
3. Gastroenterolo- Study of the digestive tract and its disorders.
gy
4. Digestive Tract Hollow tube from mouth to anus, also GI tract / a
5. Accessory Or- Organs aiding digestion: salivary glands, teeth, liver, pancreas and gallbladder.
gans
6. Structures of the mouth, pharynx, esophagus, stomach, small intestine, large intestine, rectum and
digestive tract anus
7. Salivary glands mouth
empty secretions
into
, Anatomy and Physiology of the Digestive System
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8. Salivary glands saliva (Greek word for spittle)
are exocrine
glands that se-
crete
9. How much saliva approx. 1 L
is produced per
day?
10. Liver, gallblad- small intestine
der and pancreas
empty secretions
into
11. Digestion Process of breaking down food into smaller particles for absorption
12. Absorption Movement of digested nutrients into blood and lymph.
13. Relaxation of the keeps the base of the esophagus open allowing the passage of food into the
LES stomach
14. Persistent acid permanent structural damage to the lower esophagus
reflux (GERD) can
cause
15. Burning sensa- high acidity of the stomach contents
tion is a result of
16. Mechanical Di- Physical breakdown of food into smaller pieces by physical means
gestion
17. Chemical Diges- Chemical alteration of food by enzymes and acids.
tion
, Anatomy and Physiology of the Digestive System
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18. Layers of diges-
tive tract
19. Mucosa Innermost layer of the digestive tract, aids in digestion and absorption.
20. Submucosa Layer beneath mucosa containing lymphatic vessels, blood vessels and nerves.
21. Muscle Layer Third layer, responsible for peristalsis and segmentation.
22. Peristalsis Rhythmic muscle contractions pushing food through the tract.
23. Serosa Outermost layer, anchors organs and contains blood vessels.
24. Enteric Nervous Regulates GI motility and secretion, known as 'gut feeling'.
System
25. Mouth structures teeth, tongue, salivary gland and buccal cavity
include: