The Question is from neet-zoology structural-organisation-in-animals , and it was created by the author A SUBRAMANYAM

Question

Select the correct sequence of organs in the alimentary canal of cockroach starting from mouth

A SUBRAMANYAM · Accepted Answer

## CORE INFORMATION
✓ **Answer**: A
## CONCEPT FRAMEWORK
	**Primary Concept**: Sequence of organs in the cockroach alimentary canal.
	**Related Topics**: Insect anatomy, digestive physiology.
	**Prerequisites**: Basic knowledge of insect digestive system.
## SOLUTION PATHWAY
**Given Information**:
		The question asks for the correct sequence of organs in the cockroach alimentary canal, starting from the mouth.
		The correct sequence of organs in the cockroach alimentary canal is Pharynx, Oesophagus, Crop, Gizzard, Ileum, Colon, and Rectum.
**Method & Steps**:
	1.	Recall the correct order of organs involved in digestion in a cockroach.
		Reasoning: The alimentary canal of a cockroach is a tube-like structure with distinct organs for specific functions.
		Formula/Rule: None applicable.
	2.	Compare each given sequence to the known correct sequence.
		Working: Option A matches the correct sequence. Option B, C and D have the gizzard and crop in the wrong order.
		Key Point: The crop stores food while the gizzard grinds it.
	3.	Select the correct sequence
		Result: The correct sequence is Pharynx -> Oesophagus -> Crop -> Gizzard -> Ileum -> Colon -> Rectum.
		Verification: This matches the known anatomical structure of the cockroach digestive system.
 ## OPTION ANALYSIS
[A] ✓: This sequence correctly represents the order of organs in the cockroach alimentary canal, starting from the mouth.
[B] :x: This option incorrectly places the gizzard before the crop.
[C] :x: This option incorrectly places the gizzard before the crop.
[D] :x: This option incorrectly places the ileum, crop and gizzard before the crop.
 ## LEARNING AIDS
	**Common Mistakes**:
		1.[Error 1]: Confusing the order of the crop and gizzard. [How to avoid]: Remember that the crop stores food before it is ground in the gizzard.
		2.[Error 2]: Incorrectly placing the ileum in the sequence. [How to avoid]: The ileum is the first part of the hindgut.
	**Quick Tips**:
		1.[Helpful shortcut]: Use a mnemonic device to remember the order: 'P-O-C-G-I-C-R'.
		2.[Memory aid]: Visualize the path of food through the cockroach's body.

A SUBRAMANYAM · Answer

The correct Option is "${m{Pharynx}}\, 	o \,{m{Oesophagus}}\, 	o \,{m{Crop}}\, 	o \,{m{Gizzard}}\, 	o \,{m{Ileum}}\, 	o \,{m{Colon}}\, 	o \,{m{Rectum}}$"

A SUBRAMANYAM · Answer

${m{Pharynx}}\, 	o \,{m{Oesophagus}}\, 	o \,{m{Gizzard}}\, 	o \,{m{Crop}}\, 	o \,{m{Ileum}}\, 	o \,{m{Colon}}\, 	o \,{m{Rectum}}$

A SUBRAMANYAM · Answer

${m{Pharynx}}\, 	o \,{m{Oesophagus}}\, 	o \,{m{Gizzard}}\, 	o \,{m{Ileum}}\, 	o \,{m{Crop}}\, 	o \,{m{Colon}}\, 	o \,{m{Rectum}}$

A SUBRAMANYAM · Answer

${m{Pharynx}}\, 	o \,{m{Oesophagus}}\, 	o \,{m{Ileum}}\, 	o \,{m{Crop}}\,\, 	o \,{m{Gizzard}} 	o \,{m{Colon}}\, 	o \,{m{Rectum}}$

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