Digestive system

tigrebright's version from 2017-02-22 20:35

Section 1

Question Answer
alimentary canalGI (gastrointestinal) tract
tunicacoat or covering
tunica serosaouter most covering of the alimentary canal aka visceral peritoneium
mesenterysuspensory structure that houses blood vessels and nerves that supply the digestive tract
tunica adventitialayer of connective tissue connecting the gi tube to other structures

Section 2

Question Answer
tunica muscularisconsists of 2 thick layers of smooth muscle
inner muscularismuscle fibers aligned circularly
outer muscularismuscle fibers aligned longitudinally
motilethe ability of spontaneous movement
peristalsismovements that squeeze and propel solid or liquid nutrients in the lumen
mycentric plexusmuscle + intestine layer between the inner & outers muscularis

Section 3

Question Answer
tunica submucosahighly vascular layer; function to serve the mucosal layer
submucous plexusprovides nervous control to the mucosa
tunica mucosainnermost layer of the alimentary canal
lamina proprialayer of loose connective tissue withing the tunica mucosa
lamina musculalris mucosaithin layer of smooth muscle that allows the mucosa to move and fold

Section 4

Question Answer
stomachserves mostly as storage for food
cardiac orificejunction between the esophagus and the stomach
fundusdome-shaped portion of the stomach
body (of the stomach)located between the lesser and greater curvatures
pyloruslast area of the stomach, just before the duodenum

Section 5

Question Answer
small intestinelongest portion of the alimentary canal
duodenumfirst part of the small intestine; receives secretions from the liver and pancreas
jejunummiddle portion
ileumlast portion;makes the transition to the large intestine
ileocecal valvetransition valve between the small and large intestine

Section 6

Question Answer
large intestinethe distal-most portion of the alimentary canal
cecumopens into the colon; contains the appendix
colonsecond portion of the large intestine
hepatic flexuresharp bend in the colon at the liver
transverse colonbetween the hepatic flexure and the splenic flexure
splenic flexuresharp bend in the colon; beginning of the descending colon
sigmoid colons-shaped bend at the end of the colon
rectumbetween the sigmoid colon and the anal canal
anus/anal canalmuscular opening in the muscles of the pelvic floor

Section 7