NUTRITION
THE HUMAN BODY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The thumb has more joints than the other fingers.
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The thumb has only two joints but the other fingers have three.
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The thumb is articulated but the other fingers are not.
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None of the above
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Detailed explanation-1: -Your thumb is different from your fingers. Your fingers have two joints and three bones called phalanges or phalanxes. A thumb only has one joint and two phalanges.
Detailed explanation-2: -What makes human hands unique? The human opposable thumb is longer, compared to finger length, than any other primate thumb. This long thumb and its ability to easily touch the other fingers allow humans to firmly grasp and manipulate objects of many different shapes.
Detailed explanation-3: -Because of the angle of the carpometacarpal joint, the thumb faces not forward, as the fingers do, but sideways, across the hand. The articular surface on the trapezium is curved in two planes, from side to side, and from back to front. The base of the first metacarpal is curved in the same way.