8 résultats pour "menstruation"
- menstruation 1 PRÉSENTATION menstruation, phase du cycle reproductif (cycle menstruel) de la femme, se traduisant par un écoulement (règles ou menstrues) composé de sang et de cellules de la paroi de l'utérus, évacué par le col de l'utérus puis le vagin.
- Menstruation - biologie.
- ménopause 1 PRÉSENTATION ménopause, période de la vie de la femme caractérisée par l'arrêt de l'ovulation et des menstruations.
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Anatomy.
The body defends itself against foreign proteins and infectious microorganisms by means of a complex dual system that depends on recognizing a portion of the surfacepattern of the invader. The two parts of the system are termed cellular immunity, in which lymphocytes are the effective agent, and humoral immunity, based on theaction of antibody molecules. When particular lymphocytes recognize a foreign molecular pattern (termed an antigen), they release antibodies in great numbers; other lymphocy...
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Human Sexuality.
About six weeks after conception, if a Y chromosome is present in the embryo's cells (as it is in normal males), a gene on the chromosome directs the undifferentiatedgonads to become testes. If the Y chromosome is not present (as in normal females), the undifferentiated gonads will become ovaries. If the gonads become testes, they begin to produce androgens (male hormones, primarily testosterone) by about eight weeks after conception. These androgens stimulate development of the one set of the...
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Absence de règles : aménorrhée.
Absence de règles : aménorrhée -autres maladies : infec tion, diabète, cancer et tumeurs; -médicaments : pilules con tracep ti ves, tranquilli sants, hormones, antican céreux; -troubles hormonaux : troubles de la thyroïde, syndrome de Cushing et tumeur sécré t ant des hormones; -anomalies génétiques : syndrome de Turner, hermaphrodisme; -malformations congéni ta les : malformation ou absence d'utérus ou du vagin, imperforation de...
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Hormone - biologie.
Die Nebenniere besteht aus zwei Teilen: dem inneren Mark (Medulla) und der äußeren Rinde (Cortex). Die Nebennierenrinde produziert Hormone, die den Wasser- undIonenhaushalt des Organismus regulieren (Mineralocorticoide, siehe Aldosteron). Darüber hinaus entstehen auch Hormone in der Rinde, welche die Ausbildung sekundärer Geschlechtsmerkmale beeinflussen. Demgegenüber sind die Hormone des Nebennierenmarks von Bedeutung für die Bereitstellung von Glucose, u. a. durch die Umwandlungvon Proteinen...
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Reproduction - biology.
E Gestation After fertilization of the egg, the resulting zygote undergoes cell division and differentiation to form the embryo. In most higher plants, the embryo is enclosed in a layerof nutritive material surrounded by a hard outer covering, forming the seed. In most lower animals the embryo, surrounded by the nutritive material of the formerovum, is enveloped by a leathery or calcareous shell and is extruded from the body of the female. Animals, such as birds, that lay their eggs before the...