Human Physical Characteristics – In biology, man It is usually studied as one of many species on Earth. The study of human biology is sometimes also extended to the psychological and physical aspects, but usually not to the spiritual or religious. Biologically, humans are defined as hominids of the species Homo sapiens. The only remaining subspecies of this Homo sapiens is Homo sapiens sapiens. They are usually considered the only surviving species in the genus Homo. Humans use their perfect bipedal locomotion (two legs). With the two legs to move the body, the two front legs can be used to manipulate objects using the thumbs (thumbs).
The average American adult female height is 162 cm (64 inches) and the average weight is 62 kg (137 pounds). Men are generally larger: 175 cm (69 in) and 78 kilograms (172 pounds). Of course these figures are only averages, human physical form varies greatly, depending on factors of place, and history. Although body size is generally influenced by heredity, environment and culture can also influence it, as can food nutrition.
Child man born after nine months of gestation, weighing generally 3-4 kilograms (6-9 pounds) and 50-60 centimeters (20-24 inches) in height. Helpless at birth, they continue to grow for several years, generally reaching sexual maturity at around 12-15 years of age. Boys will still continue to grow for several years after this, usually the growth will stop around the age of 18 years.
Skin color man varies from almost black to reddish white. In general, people with ancestors from hot areas had darker skin than people with ancestors from areas that received little sunlight. (However, this is of course not an absolute rule, there are people who have ancestors who came from hot, and less hot areas; and these people can have different skin colors in the range of the spectrum.) On average, women have fair skin. slightly lighter than men.
Estimated longevity man at birth approaching 80 years in affluent countries, this can be achieved thanks to the help of science, and technology. The number of people aged one hundred years and over in the world was estimated at around 50,000 in 2003. The maximum life span of a human being is estimated to be around 120 years.
While many other species are extinct, Humans can still exist, and thrive today. Their success is due to their high intellectual power, but they also have physical deficiencies. Humans tend to suffer from obesity more than any other primate. This is largely because humans are able to produce more body fat than any other primate family. Because humans are purely bipedal (it’s only natural to use two legs to walk), the hip region, and spine also tend to become brittle, causing mobility difficulties in old age. Also, human women suffer from the relative complexity of childbearing (pain from childbirth for up to 24 hours is not common). Prior to the 20th century, childbirth was a dangerous ordeal for some women, and it still occurs in some remote or undeveloped areas of the world today.