Question

What is duodenum,jejunun ,ileum and caicum,colon,rectum in human activity

Answer 1

Hii....duodenum jejunum and ileum are parts of small intestine which help in complete digestion(duodenum) and absorption(jejunum and ileum)....
Caecum ,colon and rectum are parts of large intestine which help in formation of faecal matter and absorption of excess water...

hope this helps!!

Answer 2

these all are a part of human digestive system.
deudenum, jejunum, ileum are a part of small intestine
ceasum, colon, rectum are a part of large intestine

deudenum is involved in thecomplete digestion
it contains bile juice from gall blader for the emulsification of fats
it has pancreatic juices:
pancreatic amylase-sugar converts to glucose
pancreatic lipase-fat globules into fatty acids and glycerol
trypsin-converts peptides and peptones into amino acids

jejunum and ilium are used for absorption

caesum is responsible for digestion of cellulose in herbivore animals.
colon has three parts-
ascending colon
horizontal colon
descending colon
the food and water both enter the colon and then the water is absorbed in it.

the rectum stores the undigested remaining food material temporarily
then the food is thrown out through anus