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The heart receives blood from the sinuse...

The heart receives blood from the sinuses through

A

Haemocoel

B

Alary muscles

C

Ostia

D

Aorta

Text Solution

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The correct Answer is:
**Step-by-Step Solution:** 1. **Understand the Question**: The question asks how the heart of the cockroach receives blood from the sinuses. 2. **Identify the Organism**: The heart in question belongs to the cockroach, which is classified under the genus Periplaneta. 3. **Know the Circulatory System Type**: Cockroaches have an open type of circulatory system. This means that their blood (hemolymph) is not confined to blood vessels but flows freely in a cavity. 4. **Define Hemolymph**: In cockroaches, the blood is colorless and is referred to as hemolymph. It consists of a colorless plasma and hemocytes. 5. **Identify the Cavity**: The hemolymph is poured into a space known as the hemocoel, which bathes the visceral organs of the cockroach. 6. **Describe the Heart Structure**: The heart of the cockroach is muscular and tubular, located in the mid-dorsal line of the thorax and abdomen. 7. **Identify the Openings**: The heart has openings called ostia. These are apertures that allow hemolymph to enter the heart from the hemocoel. 8. **Explain the Function**: The ostia receive blood from the sinuses and allow the heart to pump it to the anterior part of the body through its contractile activity. 9. **Choose the Correct Answer**: Given the options (hemocele, allery muscles, ostea, or aorta), the correct answer is "ostea" because it is the structure that receives blood from the sinuses. **Final Answer**: The heart receives blood from the sinuses through **ostia**. ---
**Step-by-Step Solution:** 1. **Understand the Question**: The question asks how the heart of the cockroach receives blood from the sinuses. 2. **Identify the Organism**: The heart in question belongs to the cockroach, which is classified under the genus Periplaneta. 3. **Know the Circulatory System Type**: Cockroaches have an open type of circulatory system. This means that their blood (hemolymph) is not confined to blood vessels but flows freely in a cavity. ...
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