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Blood vascular system in hemichordata is...

Blood vascular system in hemichordata is

A

(a) open

B

(b) reduced

C

(c) closed

D

(d) absent

Text Solution

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The correct Answer is:
To answer the question about the blood vascular system in Hemichordata, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding the Blood Vascular System**: - The blood vascular system refers to the circulatory system in organisms, which is responsible for the transport of nutrients, gases, and waste products throughout the body. 2. **Identifying the Type of Circulatory System in Hemichordata**: - In Hemichordates, the circulatory system is characterized by the presence of blood that flows through channels similar to arteries and veins, as well as through body cavities. 3. **Analyzing the Options**: - **A. Open**: This suggests that the blood is not entirely contained within vessels and can flow freely in body cavities. - **B. Reduced**: This implies that the circulatory system is minimal or less developed, which is incorrect for Hemichordates. - **C. Closed**: This indicates that blood circulates entirely within vessels, which is not true for Hemichordates as they have blood flow through both vessels and body cavities. - **D. Absent**: This would mean there is no circulatory system at all, which is incorrect since Hemichordates do possess a circulatory system. 4. **Conclusion**: - Given the characteristics of the blood vascular system in Hemichordates, the best answer is **A. Open**, as the blood flows through both blood channels and body cavities. ### Final Answer: The blood vascular system in Hemichordata is **A. Open**. ---
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