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The CORRECT statement about the digestiv...

The CORRECT statement about the digestive system of cockroach are ,
I. The entire foregut of the cockroach is lined by the cuticle.
II. The midgut is broader than the hindgut of the cockroach.
III. The proventriculus of the cockroach has teeth for grinding food particles.
IV. The digestive juice is secreted by 100 - 150 hepatic caeca present at the junction of foregut and midgut.

A

I and III

B

II and IV

C

I and II

D

III and IV

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the correct statements about the digestive system of a cockroach, we will analyze each statement one by one. ### Step-by-Step Solution: 1. **Statement I: The entire foregut of the cockroach is lined by the cuticle.** - This statement is **correct**. The foregut of the cockroach, which includes the mouth, pharynx, esophagus, crop, and gizzard, is indeed lined by a thick cuticle. 2. **Statement II: The midgut is broader than the hindgut of the cockroach.** - This statement is **incorrect**. In cockroaches, the hindgut is broader than the midgut. The hindgut consists of the ileum, colon, and rectum, which are wider compared to the midgut. 3. **Statement III: The proventriculus of the cockroach has teeth for grinding food particles.** - This statement is **correct**. The proventriculus, also known as the gizzard, contains chitinous teeth that help in grinding food particles, facilitating the digestion process. 4. **Statement IV: The digestive juice is secreted by 100 - 150 hepatic caeca present at the junction of foregut and midgut.** - This statement is **incorrect**. The digestive juices are secreted by 6 to 7 hepatic caeca located at the junction of the foregut and midgut, not 100 - 150 as stated. ### Conclusion: The correct statements about the digestive system of cockroaches are: - **Statement I**: Correct - **Statement III**: Correct Thus, the correct answer is **Option A**: Statements I and III are correct.
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