large intestine Flashcards
what is the large intestine
it is ashort ube of length 1.5 m and 4 to 6 cm in diameter so it is broader then th small inetstine
parts
caecum colon and rectum
ileocaecal valve
prevents the flow of food fom the caecum to yhe ileum or the large inetstine to the small inetstine
caecum
has atwisted projection called vermiform appendix it is avestegeal orgn bit canbe considereda s secondary lymphoid organ and the removl of it i called appendicitis
colon
into four parts ascending colon transvrse colon descending colon and sigmoid colon
hepatic flexure
th bending of the ascending colon into the transverse colon and situated near the liver
splenic flexure
bending of transverse colon into the descending colon and near the spleen
haustra
pouches of the colon and surrounded by muscular strips calle dthe taeniae coli
function of haustra
water absorption
anal sphincter
opening of the anal canal is guarde by the nal sphincter
internl anal sphincter
made of smooth muscle and involuntary
external anla sphincter
made of striped muscle and voluntary can be ocntrolled