Which one of the following structures in Periplaneta is correctly matched with its function ?

Options

A. Hepatic caeca - absorbs digested food
B. Alary muscles - contraction of spiracles
C. Spermatheca - stores sperms in males
D. Supra - oesophageal ganglion - Supplies nerves to antennae

Answer

To solve the question regarding the correct matching of structures in Periplaneta (the common cockroach) with their functions, we will analyze each option provided.

### Step-by-Step Solution:

1. **Understanding Periplaneta Structures**: First, we need to identify the structures mentioned in the options and their respective functions.

2. **Evaluating the Options**:
- **Option 1: Hepatic Ceca - Absorbs digested food**:
- The hepatic ceca are not primarily responsible for absorption. Instead, they secrete enzymes that assist in digestion. Therefore, this match is incorrect.

- **Option 2: Alary Muscles - Help in contraction of spiracles**:
- Alary muscles are involved in the circulation of hemolymph (blood) and do not help in the contraction of spiracles. Thus, this match is also incorrect.

- **Option 3: Spermatheca - Stores sperm in males**:
- The spermatheca is involved in the storage of sperm but is not exclusive to males; it also plays a role in reproduction. This description is incomplete and misleading, making this match incorrect.

- **Option 4: Supraesophageal Ganglion - Supplies nerve to antenna**:
- The supraesophageal ganglion acts as the brain of the cockroach and is responsible for supplying nerves to the antennae, facilitating sensory functions. This match is correct.

3. **Conclusion**: After evaluating all options, the correct match is **Option 4: Supraesophageal Ganglion - Supplies nerve to antenna**.

### Final Answer:
The structure in Periplaneta that is correctly matched with its function is the **Supraesophageal Ganglion**, which supplies nerves to the antennae.

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