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The thick muscular projections on the wa...

The thick muscular projections on the walls of the ventricle are called

A

columnae carneae

B

conus arteriosus

C

chordae tendineae

D

truncus arteriosus

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The correct Answer is:
To answer the question regarding the thick muscular projections on the walls of the ventricle, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding the Structure**: The question asks about the thick muscular projections found on the walls of the heart's ventricles. It is important to recognize that the heart has two main types of chambers: atria and ventricles. 2. **Identifying the Projections**: The muscular projections in the ventricles are known as trabeculae carneae. These structures are important for the function of the heart, as they help to support the heart's contraction. 3. **Differentiating from Other Muscles**: It is crucial to differentiate trabeculae carneae from other muscular structures in the heart. For instance, pectinate muscles are found in the atria, not the ventricles. 4. **Reviewing the Options**: The options provided in the question are: - A. Columnar carne - B. Conus arteriosus - C. Chordae tendineae - D. Truncus arteriosus 5. **Selecting the Correct Answer**: Among the options, "Columnar carne" (which is a variant of trabeculae carneae) is the correct term for the thick muscular projections on the walls of the ventricles. 6. **Final Conclusion**: Therefore, the answer to the question is option A: Columnar carne.
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A : Left ventricle pumps blood at a much higher pressure to all body parts involved in systemic circulation. R : The muscular wall of the left ventricle is two to four times as thick as the wall of right ventricle.