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

Parts of a typical flower with all its definations , parts of a typical fl...

parts of a typical flower? define its parts and internal parts completely? show complete colourful diagram?

Pathophysiology of chronic wasting disease, Q. Pathophysiology of Chronic w...

Q. Pathophysiology of Chronic wasting disease? We all know that heart attack i.e. myocardial infarction is not the beginning but a last stage representing acute clinical manife

Nutrition support in elderly - parenteral, Define Nutrition Support in elde...

Define Nutrition Support in elderly - Parenteral, Enteral and Oral? Under nutrition either due to dietary deficit a due to a medical complication may arise in the elderly. The

Coordination, how does impuses reaches the brain

how does impuses reaches the brain

Define essentiality of carbon for growth of micro-organism, Define the Esse...

Define the Essentiality of Carbon for the Growth of Microorganisms Carbon is needed for the skeleton of all organic molecules. Microorganisms acquire it either as inorganic car

Explain the physiological effects of ingestion of fibres, Explain the Physi...

Explain the Physiological effects of ingestion of fibres? Physiological effects of ingestion of fibres with adsorption properties are: 1. Diminished absorption of lipids. Wi

What is streatorrhoea, Q. What is Streatorrhoea? Streatorrhoea is more ...

Q. What is Streatorrhoea? Streatorrhoea is more common in Crohn's disease due to heal resection. This may favour calcium-fatty acid complex formation and increased excretion. I

Importance of the glucose blood level for human health, Q. What is the impo...

Q. What is the importance of the glucose blood level for human health? The glucose blood level (glycemia) must be kept normal if it is abnormally low there is not sufficient gl

Explain major role in contributing towards motivation, Major role in contri...

Major role in contributing towards motivation. Psychological factors: Depression, anxiety or phobia induced by illness,  life- style changes or medication effects, may hinder

Why do plants need to exchange gases with the environment, Why do plants ne...

Why do plants need to exchange gases with the environment? Plants require to do gas exchange because they create aerobic cellular respiration (like animals) and they need to ge

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