The number of chambers in the heart of cockroach is

Options

A. 23
B. 13
C. 4
D. 3

Answer

To determine the number of chambers in the heart of a cockroach, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Organism**: We are focusing on the cockroach, which is an insect belonging to the phylum Arthropoda.

2. **Understand the Structure of the Heart**: The heart of a cockroach is not like that of mammals. Instead, it is a tubular structure.

3. **Count the Chambers**: The cockroach heart consists of a total of 13 chambers. This is different from the human heart, which has 4 chambers.

4. **Recognize the Function of the Chambers**: Each chamber in the cockroach heart plays a role in circulating hemolymph (the insect equivalent of blood) throughout its body.

5. **Conclude the Answer**: Based on the information gathered, the number of chambers in the heart of a cockroach is 13.

### Final Answer:
The number of chambers in the heart of a cockroach is **13** (Option B).

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