Large intestine Flashcards
the circular muscle layer in the large intestine is …… but the longitudinal muscle layer is……
complete
incomplete
teniae coli
the bands of longitudinal muscle that stretch the entire length of the colon
contractions of tenaie coli are called
pouches (haustra)
the mucosa in the large intestine is comprised of
simple columnar epithelium (flat)
large intestine has large straight ……. lined with lots of goblet cells
crypts
crypts (including goblet cells) are essential for lubrication for the
movement of faeces
rectum mucosa
simple columnar epithelium
musculares externa in the rectum is ….. compared to other regions of the alimentary canal
thick
the colon has no important role in
nutrient absorption
the colon actively transports …. form the lumen into the blood it then undergoes the …… ……. of water, the …… of chyme and therefore creating solid ….. pellets
sodium
osmotic absorption
dehydration
faecal
long residence time in the colon leads to
bacterial colonisation
you get bacterial fermentation of
undigested carbs
the internal anal sphincter control
smooth muscle under automatic control
the external anal sphincter control
skeletal muscle under voluntary control
following a meal mechanoreceptors induce a
defecation reflux that allows for the urge to defecate
