Digestive system - stomach, Biology

Assignment Help:

STOMACH

  1. It is wide, J-shaped, placed obliquely on left side in upper abdominal cavity so left kidney is slightly down ward.
  2. It is 30 cm, long and 15 cm. wide.
  3. It has greater curvature on lower side and lesser curvature on upper side.
  4. Stomach is differentiated into 3 parts -

         Cardiac - Towards oesophagus.     Fundic - Middle main part.         Pyloric - Towards duodenum.

  1. Between oesophagus and cardiac stomach, cardiac valve or cardia present.
  2. Between pyloric stomach and duodenum, pyloric valve or pylorus present.
  3. Both valves do not allow regurgitation i.e. back flow of food to buccal cavity.
  4. In histology of stomach serosa, musculature, sub mucosa & mucosa present.
  5. Serosa is outer layer made up of fibres and peritonium.
  6. In musles longitudianl, circular and oblique muscles present.
  7. In sub mucosa, muscularis mucosa present differentiated into outer longidutinal and inner circular muscles.
  8. Sub mucosa also consits of mast cells, fibroblast and histocytes.
  9. Mucosa forms folds as rugae that is converted into gestric glands.
  10. Open into lumen by gastric pits. In each gland body and neck 2 parts and clear.
  11. Goblet cells present in neck only to secrete mucous.
  12. Body is made up of chief cells or zymogenic cells to secrete enzymes.
  13. In body few oxyntic cells or pariatal cells present to secrete HCl.
  14. Argentoflin cells are also noted, perhaps endocrine in nature.
  15. In Ruminent (cattle, goat, sheep, camel) Compound stomach present having Rumen. (largest pouch), reticulum (honey comb), omassum, (absent in camel & deer) and abomasum.

Related Discussions:- Digestive system - stomach

Cleft grafting, Cleft grafting  The stem of the stock is cut across....

Cleft grafting  The stem of the stock is cut across. A 'V' shaped insertion is made at the end of the stock. The scion is cut in shape. The scion is inserted into the 'V'

Triple fusion, Triple Fusion The fusion process between the other male...

Triple Fusion The fusion process between the other male gamete and the secondary nucleus follows the same pattern as syngamy. In most plants, the polar nuclei are only partial

Enumerate the principles of suturing, Enumerate the principles of suturing ...

Enumerate the principles of suturing Principles of Suturing are as follows: - Sutures should always be inserted through the more mobile tissue flap first. - A circular fo

Define the interaction of vitamin c with iron, Define the Interaction of Vi...

Define the Interaction of Vitamin C with iron? Ascorbic acid powerfully enhances absorption of non- haem iron and reverses the inhibiting effect of tea and calcium phosphate. I

Explain the digestion of carbohydrates, Explain the Digestion of carbohydra...

Explain the Digestion of carbohydrates? You are aware that 60-70% of energy is supplied by the dietary carbohydrates which are primarily present as polysaccharides (starch) fol

Define triglycerides, Q. Define Triglycerides? Triglycerides are produc...

Q. Define Triglycerides? Triglycerides are produced by the esterification of glycerol with three fatty acid molecules. They are the body's major energy store, particularly in a

Determine environmental factors of viscosity and plasticity, Environmental ...

Environmental factors of viscosity and plasticity a) Temperature affects the viscosity of a colloid. Generally, its viscosity decreases as the temperature increases. For e.g.

Pattern of cleavage, define the pattern of cleavage i all aspects

define the pattern of cleavage i all aspects

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd