What are the muscle ridges inside the ventricles?

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Prepare for the Ivy Tech Anatomy and Physiology II (APHY 102) Heart Test with multiple-choice questions, detailed explanations, and study resources. Enhance your understanding and excel in your exam!

Multiple Choice

What are the muscle ridges inside the ventricles?

Explanation:
The inside surfaces of the ventricles are ridged by muscular folds called trabeculae carneae. These irregular ridges give the ventricular walls a rough texture and help with the mechanics of contraction by increasing surface area and reducing wall suction as the heart beats. Pectinate muscles, by contrast, line the atrial walls, not the ventricles. Chordae tendineae are tendinous cords that connect valve leaflets to papillary muscles, which are themselves muscular projections inside the ventricles but not ridges.

The inside surfaces of the ventricles are ridged by muscular folds called trabeculae carneae. These irregular ridges give the ventricular walls a rough texture and help with the mechanics of contraction by increasing surface area and reducing wall suction as the heart beats.

Pectinate muscles, by contrast, line the atrial walls, not the ventricles. Chordae tendineae are tendinous cords that connect valve leaflets to papillary muscles, which are themselves muscular projections inside the ventricles but not ridges.

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