The basis of the structure, development and functioning of all multicellular organisms and humans, in particular, is their structural and functional

Theoretical studies of the human body

The basis of the structure, development and functioning of all multicellular organisms and humans, in particular, is their structural and functional unit — the cell. Its structure and functions studies the science of cytology. The cells and intercellular structures form the tissues; that studies the science of histology.

The shape, structure of the body, its organs and systems studies one of the oldest biological sciences — anatomy. People have been interested for a long time what's inside their bodies. The painting Rembrandt van Rijn depicted anatomical theater — specially equipped room (these were in Europe in the XVI-XVII centuries) for a public demonstration of autopsy people's bodies.

Physiology — the science that studies the vital functions of the whole organism and its parts of organ systems, individual organs, tissues, cells, discovering the causes, mechanisms and patterns of organism life and its interaction with the environment. Genetics studies the processes of heredity and variation in organisms, in particular the mechanisms of transmission of genetic information and hereditary diseases related with its violations. Embryology studies the development of the human embryo. Biochemistry is a science that studies the chemical composition of living beings, and various chemical processes associated with their activity. Biophysics studies the physical phenomena in the cells, tissues, organs, and physical and chemical bases of life.

Rembrandt van Rijn. Anatomy Lesson. 1632

Anthropology explores human origins with, found during the excavation, bones (teeth, jaw, skull, and other bones of the skeleton) of the ancient monkeys, apes and old people; anthropologists reconstruct the body of primitive people (diagram 1); explore ancient tools and hunting, paintings on rocks and cave walls.

These sciences and, above all, physiology are the theoretical basis of applied studies (sciences). Taken from http://worldofschool.org

Diagram 1. Reconstruction of primitive people’s faces from the remains of the skull bones (Australopithecus, Pithecanthropus, Sinanthropus, Neanderthal, and Cro-Magnon)
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