Describe the anatomy of the extensor apparatus and flexor sheath.

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Describe the anatomy of the extensor apparatus and flexor sheath.

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Hand, gripping organ at the end of the forelimb of certain vertebrates with considerable movement and flexibility in the fingers and throughout the organ. It is composed of the wrist joint, carpal bones, metacarpal bones, and phalanges. The digits consist of a medial thumb (when seen palm down) with two phalanges and four fingers, each with three phalanges. Except for humans, the primary function of the hand in all animals is movement; bipedal walking frees the hands for primarily manipulative functions.

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