Man in Nature
- Category: Anatomy
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Modern man in the classification system of animal organisms belongs to the type of chordates (Chordata), a subtype of vertebrates (Vertebrata), the class of mammals (Mammalia), a number of primates (Primates), friendly of people (Hominidae), kind of man (Homo), species Homo sapiens (Homo sapiens). The human body keeps a general structure, inherent in all vertebrates: bilateral symmetry, the prevalence of paired organs, the presence of the axial skeleton, saving some (relic) signs of segments (metamerism), better detected in primitive form. These and many other features (reduced state of smell saved some rudiments of caudal vertebrae, the presence of the rudiments of the third eyelid, etc.) testify to ways the evolution past zoological ancestors.
The main morphological features of the human body compared to other primates body include: functional forelimbs (in human upper limb - arm), high growth and differentiation of the mantle (cortex) of the brain, a significant weakening of the jaw apparatus, equal number of teeth, lack of overall hair , upright posture, prolonged childhood and so on. Modern man owns expressive language, interconnected with abstract thinking (development of the second signal system). However, the main distinguishing feature between man and animal is that people - a social being, the main condition and formation of life is socially useful labor, is closely associated with the emergence of society.
Conscious work and creating conditions of existence largely freed man from the power of a comprehensive natural selection that exists in the animal world. As a result, biological evolution, based on the adaptation of the organism to the conditions of the environment, in human society begins to give way to the evolution of material and spiritual culture. Most of the biological effects on the human body was the impact of socio-economic factors, and hence the general cultural level of the people.