Which of the following statements is incorrect about the heart of cockroach ?

Options

A. Heart is present along the mid-dorsal line of thorax and abdomen
B. It is 13-chambered
C. It is neurogenic
D. It is myogenic

Answer

To determine which statement about the heart of a cockroach is incorrect, let's analyze each statement one by one.

1. **Statement 1**: "The heart is present along the mid dorsal line of the thorax and the abdomen."
- This statement is **correct**. The heart of a cockroach is indeed located along the mid dorsal line of its thorax and abdomen.

2. **Statement 2**: "It is 13 chambered."
- This statement is **correct**. The heart of a cockroach consists of 13 chambers.

3. **Statement 3**: "It is neurogenic."
- This statement is **correct**. The heart of a cockroach is neurogenic, meaning that its contractions are regulated by the nervous system.

4. **Statement 4**: "It is myogenic."
- This statement is **incorrect**. The heart of a cockroach is not myogenic; it is neurogenic. Myogenic hearts generate their own impulses for contraction, which is not the case for the cockroach's heart.

Based on the analysis, the incorrect statement about the heart of the cockroach is:
**Option 4: "It is myogenic."**