![]() ![]() The average male human’s hand is only 7. Chimpanzees and all other nonhuman primates have only the working version in other words, they’re on the powerful, “sprinter” end of the spectrum. The average male gorilla’s hand is 6 inches across and 12 inches long. Chimpanzee Hand Preference in Throwing and Infant Cradling: Implications for the Origin of Human Handedness. People with two working versions of this gene are overrepresented among elite sprinters while those with the nonworking version are overrepresented among endurance runners. (Puny jaws have marked our lineage for as least 2 million years.) Many people have also lost another muscle-related gene called ACTN3. One gene, for example, called MYH16, contributes to the development of large jaw muscles in other apes. In the past few years, geneticists have identified the loci for some of these anatomical differences. A chimpanzee’s skeletal muscle has longer fibers than the human equivalent and can generate twice the work output over a wider range of motion. But a more important factor seems to be the structure of the muscles themselves. The average male gorilla’s hand is 6 inches across and 12 inches long. Hip is narrower in monkeys and angle of attachment of femur in. Phalanges of digits longer in monkeys, compared to those of human. In human hindlimb is comparatively longer. Monkeys walk on all four limbs: hence forearms are comparatively longer. How did we get to be the weaklings of the primate order? Our overall body architecture makes a difference: Even though chimpanzees weigh less than humans, more of their mass is concentrated in their powerful arms. In addition to adaptations for walking and climbing, a notable difference between gorilla and human hands is their size. There are innumerable differences: few major characters could be discussed here. But it is a fact that chimpanzees and other apes are stronger than humans. For example, like most primates, chimps retained their thumbs on both their hands and feet. ![]() Since the thumb is not as long, it just meets up with the palm, while the chimps other four fingers extend upward. So the figures quoted by primate experts are a little exaggerated. The opposable digit has evolved differently for different species. Conversely, chimp hands are much longer and narrower. ![]()
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