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The muscle bundles in the body wall of a...

The muscle bundles in the body wall of aschelminthes termed

A

triads

B

aponeurosis

C

quandrants

D

fasciculi

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### Step-by-Step Solution 1. **Understanding Aschelminthes**: Aschelminthes, also known as pseudocoelomates, are a group of invertebrates characterized by having a body cavity that is not completely lined by mesoderm. This body cavity is referred to as a pseudocoel. 2. **Body Wall Structure**: The body wall of Aschelminthes is composed of multiple layers. Specifically, it has four layers: the inner layer is the endoderm, followed by a pseudocoel, then the mesoderm, and finally the outer ectoderm. 3. **Muscle Bundles**: The muscle bundles present in the body wall of Aschelminthes are specifically termed "quadrants." This term reflects the four layers present in their body structure. 4. **Comparison with Other Terms**: - **Triads**: This term refers to a structure in human muscle tissue and is not applicable to Aschelminthes. - **Aponeurosis**: This is a type of fibrous tissue found in mammals, not in Aschelminthes. - **Fasciculi**: This term refers to bundles of muscle fibers, which is also not relevant to the classification of muscle bundles in Aschelminthes. 5. **Conclusion**: Therefore, the correct term for the muscle bundles in the body wall of Aschelminthes is "quadrants."
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