Tubular heart of cockroach has how many chambers ?

Options

A. 10
B. 13
C. 12
D. 11

Answer

To determine how many chambers the tubular heart of a cockroach has, we can follow these steps:

1. **Identify the organism**: The question specifically asks about the cockroach, which is a member of the phylum Arthropoda.

2. **Understand the heart structure**: The heart of a cockroach is referred to as a tubular heart. This type of heart is different from the more complex hearts found in mammals.

3. **Count the chambers**: The tubular heart of a cockroach consists of 13 chambers. Each chamber plays a role in the circulation of blood throughout the cockroach's body.

4. **Identify the function of the chambers**: The chambers of the heart are involved in the circulation of blood, and the oxygenated blood enters the heart through openings called ostia.

5. **Conclude the answer**: Based on the information gathered, the tubular heart of a cockroach has 13 chambers. Therefore, the answer to the question is option B, which is 13.