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What is the number of chambers in the he...

What is the number of chambers in the heart of periplaneta americana ?

A

2 chambers

B

4 chambers

C

13 chambers

D

11 chambers

Text Solution

AI Generated Solution

The correct Answer is:
To determine the number of chambers in the heart of Periplaneta americana (the cockroach), we can follow these steps: ### Step-by-Step Solution: 1. **Identify the Organism**: Recognize that Periplaneta americana is the scientific name for the cockroach. 2. **Locate the Heart**: Understand that the heart of the cockroach is located mid-dorsally, meaning it is situated along the back of the organism. 3. **Understand the Structure of the Heart**: The heart of the cockroach is described as pulsatile, indicating that it functions by contracting and relaxing to pump hemolymph (the insect equivalent of blood). 4. **Count the Chambers**: The heart consists of 13 segmentally arranged funnel-shaped chambers. This means that there are 13 distinct sections in the heart. 5. **Note the Features of the Chambers**: Each of the 13 chambers (except the last one) has a pair of small lateral apertures called ostia. These ostia allow hemolymph to enter the heart from the pericardial sinus. 6. **Conclusion**: Based on the information gathered, we conclude that the heart of Periplaneta americana has **13 chambers**. ### Final Answer: The number of chambers in the heart of Periplaneta americana is **13**. ---
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