quiz 7/ midterm week Flashcards
peristalsis contractions
food is moved thru alimentary track by..
peristaltic action
wave-like contractions and relaxations, smooth muscles contract while others relax
peristalsis
this is a characteristic thru the entire digestive tract
upper esophageal sphincter
most superior part of the esophagus
lower esophageal sphincter
medial part of the esophagus
cardiac sphincter
other name for the lower esophageal sphincter
stomach
most inferior part of the esophagus
immediately posterior to the trachea
location of the esophagus
only for swallowing
the esophagus is only open for….
collapsed
the esophagus is normally this…
cervical, throacic, and abdominal
3 divisions of the esophagus
cricopharngenus to the sternal notch
location of the cervical esophagus
sternal notch to diaphragmatic hiatus
location of the thoracic esophagus
external fibrous layer
shrink wrap around the esophagus, outer most layer
longitudinal muscle layer
this runs up and down the esophagus, outer layer
circular muscle layer
this is deep to the longitudinal layer, inner layer
longitudinal and circular muscle layer
together these 2 things create peristaltic actions
Auerbach’s Plexus
submucosal layer of the esophagus, network of nerve fibers that coordinate peristaltic movement
6-7 liters of mucous
this amount is secreted from the alimentary tract every day
reabsorbed
most of the secreted mucous in the digestive tract is…
sphincter
ring of muscle, constantly changing = relax and tighten, neural control
cardiac sphincter
upper terminus of the stomach
pyloric sphincter
lower terminus of the stomach
body
main portion of the stomach
fundus
most superior portion of the stomach