Multiple Choice
Which part of the muscular system is primarily responsible for maintaining our upright posture?
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9. Muscle Tissue
Introduction to Muscles and Muscle Tissue
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What are the muscular ridges within the ventricles called?
A
Papillary muscles
B
Pectinate muscles
C
Trabeculae carneae
D
Chordae tendineae
Verified step by step guidance1
Understand the anatomy of the heart: The heart is divided into four chambers, two atria and two ventricles. The ventricles are the lower chambers responsible for pumping blood out of the heart.
Identify the structures within the ventricles: The ventricles contain several important structures, including muscular ridges, which play a role in the heart's function.
Differentiate between the options: Papillary muscles are involved in anchoring the chordae tendineae, which prevent valve prolapse. Pectinate muscles are found in the atria, not the ventricles.
Focus on trabeculae carneae: These are the muscular ridges found on the inner walls of the ventricles. They help prevent the walls of the ventricles from sticking together during contraction.
Conclude with the correct identification: The muscular ridges within the ventricles are called trabeculae carneae, distinguishing them from other muscular structures in the heart.
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