Which part is the true stomach in a ruminant?

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Multiple Choice

Which part is the true stomach in a ruminant?

Explanation:
In ruminants, the stomach isn’t a single pouch but four compartments. Three of them—the rumen, reticulum, and omasum—are fermentation and mechanical-processing chambers and lack gastric glands, so they don’t acidify and enzymatically digest proteins the way a true stomach does. The abomasum, however, is the true glandular stomach. It contains gastric glands that secrete hydrochloric acid and pepsinogen, creating the acidic environment and proteolytic digestion essential for protein digestion, just like the monogastric stomach. From there, digesta moves into the small intestine.

In ruminants, the stomach isn’t a single pouch but four compartments. Three of them—the rumen, reticulum, and omasum—are fermentation and mechanical-processing chambers and lack gastric glands, so they don’t acidify and enzymatically digest proteins the way a true stomach does. The abomasum, however, is the true glandular stomach. It contains gastric glands that secrete hydrochloric acid and pepsinogen, creating the acidic environment and proteolytic digestion essential for protein digestion, just like the monogastric stomach. From there, digesta moves into the small intestine.

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