6.9.2021 BDS II
LARGE INTESTINES
(COLON)
caecum to
descending colon
,Large intestine - Colon
Terminal part of alimentary canal
Extends from caecum to rectum
1.5 metres in length
Function: absorption of water & electolytes,
storage of undigested food till ready for defaecation
Parts:
Caecum & appendix
Ascending colon Note embryological
Right colic (hepatic) flexure blood supply of GIIT
Transverse colon
Left colic (splenic) flexure Inverted “U”
Descending colon
Sigmoid colon
Rectum
, Large intestine - Colon
External surface
Haustra Omental appendices
3 flat bands running longitudinally
= taeniae coli
◼ Converge at root of appendix
◼ Shorter than colon, reduce length
◼ Responsible for sac-like appearance
called haustrae
Small fat lobules hang from surface
= omental appendices
Plica semilunaris
Taeniae coli
LARGE INTESTINES
(COLON)
caecum to
descending colon
,Large intestine - Colon
Terminal part of alimentary canal
Extends from caecum to rectum
1.5 metres in length
Function: absorption of water & electolytes,
storage of undigested food till ready for defaecation
Parts:
Caecum & appendix
Ascending colon Note embryological
Right colic (hepatic) flexure blood supply of GIIT
Transverse colon
Left colic (splenic) flexure Inverted “U”
Descending colon
Sigmoid colon
Rectum
, Large intestine - Colon
External surface
Haustra Omental appendices
3 flat bands running longitudinally
= taeniae coli
◼ Converge at root of appendix
◼ Shorter than colon, reduce length
◼ Responsible for sac-like appearance
called haustrae
Small fat lobules hang from surface
= omental appendices
Plica semilunaris
Taeniae coli
