How many chambered heart is found in cockroach?

Options

A. 4
B. 9
C. 11
D. 13

Explanation

**Step-by-Step Solution:**

1. **Identify the Organism**: The question asks about the heart structure of a cockroach, which is an insect belonging to the class Arthropoda.

2. **Understand the Circulatory System**: Cockroaches have an open circulatory system, which is typical for many arthropods. This means that their blood (hemolymph) is not confined to blood vessels but flows freely in the body cavity.

3. **Examine the Heart Structure**: The heart of a cockroach is tubular in shape. It is important to note that this tubular heart is divided into several chambers.

4. **Count the Chambers**: The heart of a cockroach consists of a total of 13 chambers. This is a specific characteristic of the cockroach's heart structure.

5. **Compare with Other Organisms**: To clarify, other organisms have different heart structures. For example, mammals have a 4-chambered heart, while other numbers like 9 or 11 chambers are not found in cockroaches.

6. **Conclusion**: Therefore, the heart of a cockroach has a total of 13 chambers.

**Final Answer**: The cockroach has a 13-chambered heart.

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