Compare the small intestine to the large intestine in terms of histological (tissue) organization, size, and unique anatomical features. How do the differences between the small and large intestines give you a clue as to their different functions in the digestive system? Solution Small intestine: it is the largest part of the alimentary canal with narrow diameter and it\'s anatomical features are it contains the three parts namely duodenum, jejunum and ileum.Jejunum is the middle portion between the duodenum and ileum.Duodenum contains the pancreas and small intestine receives the pancreatic juices and bile .It contains the peyers patch in small intestine and haustoria are absent.Internal surfaces contains the circular folds or plicae circulates. villa are present. Brunner\'s glands are present. size ranges from 4.5 to 7 m long and width of 3.5 to 4.5 width. Histological features are it contains four layers like serosa, muscularis,sub mucosa, mucosa.Serosa is the outer most layer and it secrets serous fluid, muscularis is responsible for gut movement that is peristalsis, sub mucosa joins to the mucosa and underlying smooth muscle. The main function of small intestine is to absorb nutrients and minerals. Large intestine: It is comparatively shorter than small intestine .It\'s size ranges from 1.5 meters long and 4 to 5 cm in diameter. It\'s anatomical features are it has ascending colon consists of caecum and appendix, transverse colon consists of colic flexures and transverse mesocolon, descending colon and sigmoid s shaped colon. It\'s histological features are thick mucosa with deep crypts but it does not contain villi and the epithelium consists of columnar absorptive cells, endocrine cells basal stem cells and many goblet cells. The main function of large intestine is to absorb water from remaining indigestible food and transmit the useless waste materials from the body. As they have different anatomical , histological and structural features so we can say that the small intestine and large intestine are different in their respective functional features..

1. Compare the small intestine to the large intestine in terms of histological (tissue) organization,
size, and unique anatomical features. How do the differences between the small and large
intestines give you a clue as to their different functions in the digestive system?
Solution
Small intestine: it is the largest part of the alimentary canal with narrow diameter and it's
anatomical features are it contains the three parts namely duodenum, jejunum and ileum.Jejunum
is the middle portion between the duodenum and ileum.Duodenum contains the pancreas and
small intestine receives the pancreatic juices and bile .It contains the peyers patch in small
intestine and haustoria are absent.Internal surfaces contains the circular folds or plicae circulates.
villa are present. Brunner's glands are present. size ranges from 4.5 to 7 m long and width of 3.5
to 4.5 width. Histological features are it contains four layers like serosa, muscularis,sub mucosa,
mucosa.Serosa is the outer most layer and it secrets serous fluid, muscularis is responsible for
gut movement that is peristalsis, sub mucosa joins to the mucosa and underlying smooth muscle.
The main function of small intestine is to absorb nutrients and minerals.
Large intestine: It is comparatively shorter than small intestine .It's size ranges from 1.5 meters
long and 4 to 5 cm in diameter. It's anatomical features are it has ascending colon consists of
caecum and appendix, transverse colon consists of colic flexures and transverse mesocolon,
descending colon and sigmoid s shaped colon. It's histological features are thick mucosa with
deep crypts but it does not contain villi and the epithelium consists of columnar absorptive cells,
endocrine cells basal stem cells and many goblet cells. The main function of large intestine is to
absorb water from remaining indigestible food and transmit the useless waste materials from the
body.
As they have different anatomical , histological and structural features so we can say that the
small intestine and large intestine are different in their respective functional features.