Alimentary system Flashcards
what are the 3 sections of the large intestine
Caecum, Colon, Rectum
name the 4 sections of the colon
Ascending, Transverse, Descending, Sigmoid
what is the function of the Caecum
Most proximal part, It simply acts as a reservoir for chyme which it receives from the ileum
What prevents reflux of the large bowl?
ileocaecal valve
What are the two flexures in the Large intestine
Hepatic flexure- start of transverse colon
Splenic flexure
Describe the Taenia coli
3 longitudinal bands of smooth muscle on the outside of the ascending, transverse and descending colon
What is Haustra?
Circumferential contraction of the inner muscular layer of the colon
what is the Appendice epiploicae?
Pouches of peritoneum filled with fat mainly on the transverse and sigmoid colon, though not the rectum.
What is the rectum used for?
Temporary store of feases
What do rectal valves do?
Support the weight of the faeces and slow movement to the anus, which would produce the feeling of wanting to defecate. They contain circular muscle.
What is the collection of veins in the rectum called?
Internal haemorrhoidal plexus
What veins does the Internal haemorrhoidal plexus communicate with?
Portal and systemic veinage system
What veins does the Internal haemorrhoidal plexus communicate with?
Portal and systemic veinage system
What is the Ileo-caecal junction?
The junction between Caecum and ascending colon
What allows chyme to pass from S.I to L.I
Folds of mucosa
