Question:
The last part of the proctodaeum in a cockroach is:
The last part of the proctodaeum in a cockroach is:
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{Note:}
- Proctodaeum is ectodermal in origin (unlike midgut).
- "Mesentron" refers to the midgut, not part of the hindgut.
Updated On: Jun 2, 2025
- Ileum
- Colon
- Rectum
- Mesentron
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The Correct Option is C
Solution and Explanation
The alimentary canal of a cockroach is divided into three regions:
- Foregut (Stomodaeum): Mouth → Oesophagus → Crop → Gizzard
- Midgut (Mesentron): Hepatic caeca → Ventriculus
- Hindgut (Proctodaeum): Ileum → Colon → Rectum (terminal part) → Anus
The rectum is the final segment of the proctodaeum, responsible for water absorption and fecal pellet formation before excretion.
Thus, the correct answer is Rectum.
- Foregut (Stomodaeum): Mouth → Oesophagus → Crop → Gizzard
- Midgut (Mesentron): Hepatic caeca → Ventriculus
- Hindgut (Proctodaeum): Ileum → Colon → Rectum (terminal part) → Anus
The rectum is the final segment of the proctodaeum, responsible for water absorption and fecal pellet formation before excretion.
Thus, the correct answer is Rectum.
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