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

Structure and fate of endosperm, Structure and Fate of Endosperm The ...

Structure and Fate of Endosperm The cells of endosperm are usually thin-walled, large isodiametric and devoid of pits and store large amount of food materials. The starch alo

Acute complications of diabetes, Q. Show Acute Complications of Diabetes? ...

Q. Show Acute Complications of Diabetes? Acute complications of diabetes include: Hypoglycemia or low blood sugar: The most frequent cause of low blood sugar is poor timing

Explain the factors affecting gi of foods, Explain the Factors Affecting GI...

Explain the Factors Affecting GI of Foods? A variety of factors affect GI of foods. The factors which affect the rate of glucose absorption from starchy foods and therefore the

Prepare a dichotomous key, Prepare a dichotomous key the following organism...

Prepare a dichotomous key the following organisms, ant, butterfly, fly, beetle, grass hopper, wasp, ladybug, roach and dragonfly

How is the respiratory system in aquatic molluscs, How is the respiratory s...

How is the respiratory system in aquatic molluscs divided? What adaptive respiratory structure do terrestrial molluscs present? Aquatic molluscs oxygenate their blood through g

Why vasa efferentia are the ductules, Vasa efferentia are the ductules lead...

Vasa efferentia are the ductules leading from: 1. Testicular lobules to rete testis 2. Rete testis to vas deferens 3. Vas deferens to epididymis 4. Epididymis to urethra

Define multiple tube fermentation test, Define Most Probable Number Test (M...

Define Most Probable Number Test (Multiple Tube Fermentation Test)? Presence of coliforms in the water sample can be detected by performing multiple tube fermentation test whic

Deficiency diseases-iodine deficiency, Iodine  deficiency Iodine is an...

Iodine  deficiency Iodine is an important component of thyroid hormones, which play active role in several physiological process such as control of basal metabolic rate, oxidat

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