The Large Intestine Flashcards
blind diverticulum at beginning of colon
cecum
the cecum is inconspicuous in what kind of animals
carnivores
the cecum is a large blind tube in what kind of animals
ruminants
the cecum is huge in what kind of animals
horses
three parts of the cecum
base
main body
apex
_____ opens into cecum, colon or both (depending on species)
ileum
four parts to the large intestine
cecum
colon
rectum
anus
carnivore large intestine
pig large intestine
ruminant large intestine
horse large intesting
horse large intestine
muscles form bulging sac-like structures
sacculations
another name for sacculations
haustra
how are sacculations formed
areas contract then relax > next area
sacculations do what for the contents in the large intestine
prolong the time contents are there
intestinal contents
ingesta
what speed does ingesta travel
slowly
ingesta must be thoroughly _______ to allow for _______ with _________ surface
mixed
contact
absorptive
four different types of motility patterns
segmentation
peristalsis
antiperistalsis
mass movement
slow waves in the Large Intestine are initiated by
pacemaker cells
large intestine motility is under the influence of which nervous system
autonomic
large intestine motility has alternating periods of ______ and _______
activity
rest
depolarizing waves are sent toward _______ and _______ (periods of activity and rest)
stomach
rectum
depolarizing waves sent toward stomach, creates __________ movements
antiperistaltic
depolarizing waves sent toward rectum, creates __________ movements
peristaltic
two functions of the large intestine
**absorption of water and ions
**completion of carbohydrate or protein microbial digestion and absorption
horse’s fermentation center
Cecum (hindgut)
“hindgut” is positioned _______ the stomach where __________digestion occurs
after
enzymatic
when chyme passes through the large intestine, most of what is absorbed
water
what is left behind after water has been absorbed from chyme
feces
what is stimulated when feces are transported to rectum
sensory receptors
sensory receptors initiate what reflex
defecation
sensory receptors tell the colon and rectum to do what
contract
