Which structure is the principal site of calcium absorption for eggshell formation in a laying hen?
Correct answer: D. Small intestine
- A. Crop
- B. Ceca
- C. Gizzard
- D. Small intestine
Explanation
Most dietary calcium is absorbed from the small intestine, where active transport is regulated by vitamin D. The crop stores feed, the gizzard grinds it, and the ceca have major roles in fermentation and water absorption.
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