To Everyone Peripheral To Gland There Corresponds In

To everyone peripheral to gland there corresponds in a hypophysis a special hormone-regulator. It creates a number of separate systems, for example: a hypophysis - sexual glands, a hypophysis - a thyroid gland, a hypophysis - adrenal glands. But thanks to that that regulation of all these systems becomes isolated at hypophysis level, between systems interaction is carried out. The hypophysis represents, thus, the third level of regulation at higher organisms. Occurrence in the course of evolution of the central regulator - a hypophysis - was the important step in perfection of management by a body. But a hypophysis, regulating a condition glands, "is blind" concerning an external world. This regulator can receive the signals, notifying that occurs in a body, but it has no direct communication with an environment. Meanwhile that environment factors constantly did not break organism ability to live, the body adaptation to varying external conditions should be carried out. About influence of an external world we "learn" through a skin, eyes, organs of smell, hearing and taste.

During This Period The Woman Has A Fat

During this period the woman has a fat accumulation, and it is quite often possible to notice also increase in the sizes of a nose or a chin at the expense of swelling of soft fabrics of the person. In parallel in blood concentration of sugar and cholesterol raises. Sugar level sometimes becomes so considerable that doctors define such condition as "a diabetes of pregnant women". Differently, the woman during pregnancy has an infringement of the law of a constancy of the internal environment and as though certain illnesses develop. The question is fair: unless so vital phenomenon how pregnancy, to be accompanied by illnesses, especially can if to take into consideration, what in the course of evolution harmful properties would be eliminated for a long time by natural selection? We will consider it more in detail. The changes which have arisen at the pregnant woman, are peculiar not only to a human race, they, for example, as are distinctly observed and at animals. Moreover, it is possible to notice that signs "illnesses, a pregnant organism" remind those deviations which sharply arise at during the period previous spawning though at fishes unlike mammals the fruit does not develop in a parent organism.