Person as species

Person as species

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According to modern scientific representations, the person occurred from animals. Results of the genetic analysis obviously demonstrate to it given to comparative embryology and anatomy and also.

The person has many similar lines with animals. According to systematization he treats the kingdom Animals, to the subkingdom Multicellular, to type Chordates, to a subtype Vertebrata, to a class Mammals, to a subclass Placentary. Group Primacies, a suborder Humanoid, family People, the sort Person, a look the Homo sapiens and subspecies of People twice reasonable – these taxons continue the description of systematic position of the person in wildlife. What unites the person as a species with other organisms? As well as at all chordates, at the person the internal axial skeleton in the form of a chord, on the back party – a nervous tube, a body bilaterally-are symmetrically is initially stuffed up. Further in the course of an embryonal development the chord is replaced with a backbone, the skull and five departments of a brain is formed. Heart is on the belly party, there is an issued skeleton of free pair extremities. A lot of things unite the person with other representatives of a class Mammals. So, the backbone is divided into five departments: cervical, chest, lumbar, sacral and coccygeal. The skin covered with hair contains sweat and sebaceous glands. Also live birth, existence of mammary glands and feeding of cubs milk, existence of a diaphragm, four-chamber heart and homoiothermy is characteristic of the person, as well as of all mammals. Mother bears a fruit in the body, and pre-natal food of a fruit is carried out through a placenta. It indicates belonging of the person to a subclass Placentary. The lines peculiar for animals from group the Primacies, are: extremities of grasping type, existence of nails, volume sight (eyes are located in one plane), change of milk teeth on constant and others. The immediate family of Homo sapiens sapiens in terms of evolution are anthropoids. According to scientists, they have the general ancestor and developed in the parallel ways. The modern person has structure of brain and front departments of a skull, similar to anthropoids, the developed frontal lobes of a brain, abundance of crinkles of bark of big hemispheres. The external tail department of a backbone disappeared, but mimic muscles gained special development. Tells about relationship also some other indicators, such as similar Rhesus factors, antigens of blood types, menstrual cycle. Pregnancy of gorillas and chimpanzee also lasts 9 months. Approximately identical sensitivity to causative agents of certain diseases is observed. Besides similarities, the person has with animals and many differences. For example, true bipedalism is characteristic only of people. Vaulted foot, and thumbs standing approached the others and perform basic function. The spine column has the S-shaped form: its cervical and lumbar departments are directed by camber forward, chest and sacral – camber back. The pelvic bone extended. The released upper extremities turned into bodies of work. The brain department in a skull prevails over front. The mass of a brain of the person is about 1350-1500 whereas the chimpanzee and gorillas – 460-600 g of People has consciousness, abstract thinking, communicates with the help of the speech and letter, is capable to transfer and accumulate knowledge from generation to generation. In evolution of modern people the increasing weight is got by social, but not biological factors.

Author: «MirrorInfo» Dream Team

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