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10 Cards in this Set

  • Front
  • Back
Digestive System
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
Specific processes of Digestive system
Ingestion
Mechanical processing
Digestion
Secretion
Absorption
Compaction
Excretion
DS Anatomically and functionally divided into:
GI tract (alimentary canal)
Accessory organs
Histology of tract
Mucosa
Submucosa
Muscularis
Serosa
Mucosa
simple columnar epithelium (except mouth, phaynx, esophagus,anal canal).
Submucosa
Areolar connective tissue (vascular)
Muscularis
2 layers of smooth muscle..... muscle inner....circular
outer....longitudinal
Serusa
visceral peritoneum areolar connective tissueover simple squamous epithelium
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
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)