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10 Cards in this Set
- Front
- Back
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Digestive System
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All living cells need energy to function
Humans Derive energy by consuming organic molecules(food) Digestive tract prepares food for cellular utilization by: chemical and mechanical digestion |
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Specific processes of Digestive system
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Ingestion
Mechanical processing Digestion Secretion Absorption Compaction Excretion |
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DS Anatomically and functionally divided into:
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GI tract (alimentary canal)
Accessory organs |
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Histology of tract
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Mucosa
Submucosa Muscularis Serosa |
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Mucosa
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simple columnar epithelium (except mouth, phaynx, esophagus,anal canal).
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Submucosa
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Areolar connective tissue (vascular)
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Muscularis
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2 layers of smooth muscle..... muscle inner....circular
outer....longitudinal |
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Serusa
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visceral peritoneum areolar connective tissueover simple squamous epithelium
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GI Tract
Mouth |
From lips to oropharynx
Roof bony hard palete anteriorly and muscular soft palete posteriorly Muscular uvula hangs down from posterior part of soft palete |
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GI Tract
Tongue |
Floor of mouth, Lingual frenulum
Mucous membrans over skeletal muscle(chew, swallow, speech, taste buds) Extrinsic muscles....move tongue Intrinsic muscles...change shape and size Both innervated by cranial nerve 12(hypoglossal) |
