Chimpanzees and all other nonhuman primates have only the working version in other words, they’re on the powerful, “sprinter” end of the spectrum. 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. Consisting of skull (3 parts), scapula, clavicle, humerus, radius, ulna, carpal bones, bones of the index finger, 3 each right and left ribs, one each cervical. But a more important factor seems to be the structure of the muscles themselves. Unlike humans, chimpanzee muscle is composed of 67 fast-twitch fibers (MHC IIa+IId). The researchers found chimpanzee muscle fibres were longer than those of humans and were present in different ratios. Movement over any significant distance usually takes place on the ground. They also leap and swing by their arms ( brachiate) skillfully from branch to branch. The hand is one of the most distinctive traits of humankind and one of our main sources of interaction with the environment 1.The human hand can be distinguished from that of apes by its long. 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 the trees, where most feeding takes place, chimps use their hands and feet to move about. But it is a fact that chimpanzees and other apes are stronger than humans. So the figures quoted by primate experts are a little exaggerated. Differences exist between knuckle-walking in chimpanzees and gorillas juvenile chimpanzees engage in less knuckle-walking than juvenile gorillas.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |