Why Don't We Have Elbowcaps?

The video explores the structural similarities and differences between arms and legs, focusing on why legs have kneecaps while elbows do not. Kneecaps, or patellae, are sesamoid bones that enhance the power of the quadriceps muscle and protect the knee joint. In contrast, elbows lack such bones because they do not bear weight. The video also discusses the evolutionary aspect of sesamoid bones, noting that some animals have them in their elbows.

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