From Big Medical Encyclopedia

BIOMORPHOSIS (Greek bios life + morphosis an image, giving of a form) — the changes acquired by an organism during his individual life in the course of adaptation to the environment.

At animal B. it is shown by decolourizations, density of fur, plumage, body weight, extent of development of this or that body as a result of acclimatization or taming, at the person — a working or compensatory hypertrophy of bodies. Unlike adaptations (see), the changes acquired in the course of B. are irreversible.

Working, or idiopathic, the hypertrophy of body, is result of its constant overstrain. The working hypertrophy is observed in kidneys, lungs, skeletal muscles, heart (see. Hypertrophy ). At the strengthened physical activity heart hypertrophies. In the course of adaptation to unusual conditions when requirements to heart are not excessive, reasonable B. No at excessive loading to a working hypertrophy it is possible the acute muscle strain can join, to-rogo in it the centers of regeneration result. Such hypertrophied heart functions more weakly than normal. In these cases of B. loses the adaptive value and turns into painful change. S. P. Botkin emphasized that the disease had to develop with the first signs of life on Earth as, being incessantly submitted influence of environmental factors, the organism could not always adapt to them.

B.'s kind is senile involution of an organism (senile biomorphosis according to I. V. Davydovsky).

See also Pathomorphism .

Bibliography: Davydovsky I. V. Gerontology, page 55, M., 1966; it, General pathology of the person, page 11, M., 1969; Lingdemang V. K. Textbook of the general pathology, t. 1, page 33, Kiev, 1910; Harrison D. and d river. Human biology, the lane with English, page 367, M., 1968.

R. V. Nikitina.