8- Small Intestine structure and motility Flashcards
how long is the duodenum
12 fingers of 25 cm
roel of duoduenum
gastic acid neutralsision, digestion, iorn absobrtion
jejunum length
2.5 m
jejunum role
nutrient absoption
ilium length
3.5 m
ileum role
nacl/h2o absorbtion
what are pilicae
fold in the intestinal track to increase surface area for absorption
type of eptithelium in small intestines
simple colunmanr epithelium
vili length
0.5 mm
what do re cyrps relase
water and cl
what 4 strcures inceas the absoption area in intesit
plicae, villi and microvillie
how many ties is teh area increase compared to a flat tube
600 times
what do the intresial villi absopb
nacl, monosaccrareis, aminoacids, peptides, fats, vitamins, minerals, water
how much intestinal fludi is secreted each day
1500ml per day
role of h20 in digestive process
maintains lumenal conttents ina liquid state
promotes mixing of nutrients with digestive system
aids nutrient presentation to absorbing surface
dilutes and washes away potentially injurious substances