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

Which hormones produced by ovaries and testicles, Q. What are the hormones ...

Q. What are the hormones produced by the ovaries and the testicles? The testicles make androgenic hormones, the major of them being testosterone. The ovaries produce progestero

Differentiate between sterilization and disinfection, Q. Differentiate betw...

Q. Differentiate between sterilization and disinfection? Sterilization is defined as freeing the object or substance from all life of any kind. It is the process by which an ar

Define iron factors affecting absorption of dietary iron, Define Iron Facto...

Define Iron Factors affecting absorption of dietary iron? We have read earlier that iron in foods occurs either as haem or non-haem iron. Haem iron comprises of iron in combina

Effect of sodium chloride concentration on water activity, Solutes and ions...

Solutes and ions tie up water in solution. Solutes lower aw and this reduction in aw depends on the total concentration of dissolved molecules and ions. Since these bind to water m

Define feeding and nutritional management of spinal trauma, Define the Feed...

Define the Feeding and Nutritional Management of spinal trauma? The main objectives of nutritional management are to meet the nutritional needs of the initial acute phase and

What is the role of pharmacologic therapy, What is the role of pharmacologi...

What is the role of pharmacologic therapy in the treatment of peri implantitis. Pharmacological therapy for patients presenting with an ailing implant involves subgingival irri

Phyletic lineage, Ask questiona brief assignment on it #Minimum 100 words a...

Ask questiona brief assignment on it #Minimum 100 words accepted#

Explain indifferences in ionic composition, Indifferences in ionic composit...

Indifferences in ionic composition Answer A. across membranes can be created through the action of ATP driven pumps as long as number of negative and positive ions on remain equal

Why the rate of photosynthesis does increases, Why the rate of photosynthes...

Why the rate of photosynthesis does increases, peak, and then reduces as temperature increases? Increasing the temperature initially accelerates the many chemical reactions in

Define the iodine test - carbohydrates, Define the Iodine Test - Carbohydra...

Define the Iodine Test - Carbohydrates? This test is given by polysaccharides and is not given by monosaccharides or disaccharides. Principle Iodine forms a coloured ad

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