Stomach & Its Parts and Functions So Acidic Still Does Not Burn? How? YouTube Lecture Handouts

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Stomach & Parts (Cardiac, Fundus, Antrum, Pylorus, Body) Functions: So Acidic Still Does Not Burn?
So Acidic Still Does Not Burn? How

Keep in mind that battery acid can dissolve materials like metal and bone. Stomach acid, with its pH balance only one or two spots higher, can also do great damage to some of the strongest materials, like bones and teeth.

How Stomach Digests the Food?

Secretion from Stomach

  • Mucous - protect the lining of the stomach
  • Hydrochloric Acid - kills the bacteria in the stomach which reaches with the food and help the digestive juice to act.
  • Digestive Juices - breakdown the proteins into simpler substances
  • Mucous: it is related to membranes which secrete the fluid we call mucus. It is secreted by mucous neck cells in glands and surface mucous cells on stomach surface.
  • Hydrochloric acid: Also known as muriatic acid, is an aqueous solution of hydrogen chloride. It is a colorless solution with a distinctive pungent smell. It is classified as a strong acid. It is a component of the gastric acid in the digestive systems. It is secreted by Parietal Cells in Gastric Glands.
  • Gastric Juices: Secreted by digestive glands is in the stomach lining. They produce stomach acid and an enzyme that digests protein. Gastric chief cell or zymogenic cell or peptic cell in the stomach releases pepsinogen and chymosin. Pepsinogen is activated into the digestive enzyme pepsin, when it comes in contact with acid produced by gastric parietal cells.

Parts of Stomach

A sphincter is a circular muscle that normally maintains constriction of a natural body passage or orifice and which relaxes as required by normal physiological functioning.

  • Cardia: 1st part of the stomach below the esophagus. Contains the cardiac sphincter that helps to prevent stomach contents from going back up into the esophagus.
  • Fundus: Rounded area that lies to the left of the cardia and below the diaphragm.
  • Body: Largest and main part of the stomach. This is where food is mixed and starts to break down.
  • Antrum: Lower part of the stomach. The antrum holds the broken-down food until it is ready to be released into the small intestine. It is sometimes called the pyloric antrum.
  • Pylorus: Part of the stomach that connects to the small intestine. It includes the pyloric sphincter that prevents the contents of the duodenum from going back into the stomach.

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