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Which of the following is correct for th...

Which of the following is correct for the circulatory system of cockroach?

A

It is present on the dorsal side and it has thirteen units of heart in abdominal region

B

It is present on the ventral side and it has ten abdominal and three thoracic units of heart

C

It is present on the ventral side and it has thirteen units of heart in abdominal region

D

It is present on the dorsal side and it has ten abdominal and three thoracic units of heart

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question about the circulatory system of a cockroach, we need to analyze each of the provided options carefully. ### Step-by-Step Solution: 1. **Understanding the Circulatory System of Cockroach**: - The circulatory system of cockroaches is an open type of circulatory system. This means that blood is not always contained within blood vessels but flows freely through cavities. 2. **Identifying the Location of the Heart**: - The heart of a cockroach is located on the dorsal side (the back side) of its body. This is a key point to remember when evaluating the options. 3. **Counting the Heart Units**: - The cockroach has a total of 13 heart chambers. These are divided into: - 10 abdominal heart chambers - 3 thoracic heart chambers 4. **Evaluating Each Option**: - **Option 1**: "It is present on the dorsal side and it has 13 units of heart in abdominal region." - This is incorrect because while it is on the dorsal side, it does not have all 13 units in the abdominal region; it has 10 abdominal and 3 thoracic. - **Option 2**: "It is present on the ventral side and it has 10 abdominal and 3 thoracic units of heart." - This is incorrect because the circulatory system is on the dorsal side, not the ventral side. - **Option 3**: "It is present on the ventral side and it has 13 units of heart in abdominal region." - This is incorrect for the same reasons as option 2; it is on the dorsal side and not all units are in the abdominal region. - **Option 4**: "It is present on the dorsal side and it has 10 abdominal and 3 thoracic units of heart." - This is correct as it accurately describes the location and the number of heart units. 5. **Conclusion**: - The correct answer is **Option 4**: "It is present on the dorsal side and it has 10 abdominal and 3 thoracic units of heart."
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