large intestinal function Flashcards
for carnivores, ruminants, horses and birds, describe the order of the digestive tract and where the bulk of digestion occurs
which large intestine belongs to which species
discuss where water is stored in the body
- 60-70% body mass
- intracellular (30-40%)
- extracellular (20-40%)
give examples of extracellular fluid
- plasma
- lymph
- interstitial
- gastrointestinal
- synovial
- peritoneal
- pleural
how much blood is in the body per kg
90-100 ml/kg
discuss water exchange in the GI tract
- most of the water absorbed from the GIT has come from intestinal secretions
- there is a continuous process of secretion and absorption of large volumes of fluid across the intestinal wall
- most of the water is secreted in the proximal (small intestine) and absorbed both in the small and large intestine
what causes disorders in water exchange in the GIT
increases or decreases in secretion and absorption and by changes in motility
which changes of water exchange can cause diarrhea
- decrese in absorption of water in the small intestine
- increase in secretion
- increased motility
which changes in GIT water exchange will cause constipation
- increased absorptions
- decreased secretions
- decreased motility
fill out
define muscularis of intestine
muscle layer of intestine consisting of an inner circular muscular layer and a longitudinal outer muscular layer. The coordinated contractions of these layers is called peristalsis, which propels the food through the GI tract.
what is chyme
semi-fluid mass of partly digested food that is expelled by an animals stomach
what is peristalsis
- involuntary contraction and relaxation of the muscles of the intestine creating wave like movements to push the contents forwards
what is anti-peristalsis
contractions of the intestine that force the contents in the opposite direction to the normal
what is segmentation
a muscular activity that divides and mixes the chyme by alternating between backward and forward movement of the GIT contents. predominently in the SI and LI