Most aspects of human physiology are very similar to the corresponding aspects of animal physiology. The human body consists of legs , torso , arms, neck and head. The adult human body consists of 100 trillion (10-14 ) cells . The most commonly defined systems of the human body are the nervous, cardiovascular, circulatory, digestive, endocrine, immune, integumentary, lymphatic, musculoskeletal, reproductive , respiratory and urinary systems.
Humans, like most other great apes, do not have an external tail, have several blood groups, have separate thumbs and sexual dimorphism. The relatively small anatomical differences between humans and chimpanzees are the result of human bipedalism. Consequently, humans are slower at running short distances, but are among the best long-distance runners in the animal kingdom. Thinner human body hair and more productive sweat glands help to avoid heat stroke when running long distances.
The consequence of bipedality is a narrower birth canal in women . The structure of the human pelvis and toes differs from other primates. The negative aspect of these advantages of the modern human pelvis is that childbirth is more difficult and dangerous than in most other mammals, especially considering that human infants have a large head compared to other primates. This means that human babies have to turn over when passing through the birth canal, which is not the case with other primates, and this makes humans the only species whose females need help during childbirth to reduce the risk. Part of the evolutionary solution is for human fetuses to be born less developed and more vulnerable. Chimpanzee infants are cognitively more advanced than humans until the age of six months, when the rate of development of human brain synapses exceeds that of chimpanzees. Another difference between female chimpanzees and female chimpanzees is that females go through menopause and become infertile decades before the end of their lives. All other species of monkeys can give birth for the rest of their lives. Menopause probably arose because it provided an evolutionary advantage (longer care time) for young relatives. Melbet offers a welcome bonus from 100% up to a huge 200% to new players who want to test out the bookmaker's services. New customers on our platform can get a great 200% sports betting bonus with
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