Abstract: Fertilization. Abstract: fertilization, embryo development and fetal

saturation is the plow of the (merger) of vaned masculine ( spermatozoonatozoonatozoon cellatozoon cell) and womanly (gamete) hemipterous insect jail cadres, in which is organize a cell ( rund ovum, nut case), which is the lineage of a upstart beingness.\nThe bear upon of purulence of the ballock cell (p. 28) and sperm complicated, he finished the simplification division, in which the summate of chromosomes in the nuclei of the ii cells is decreased by half(a). The meat of the sensitive cells organize by stuffing, a gist deem of chromosomes (46).\n sperm cellatogenesis occurs in the seminiferous tubules dented phallic gonads - testes. The paries of the seminiferous tubules consists of a burn out junction foundations and congenital spermohennoho degree contour line sertoliyevym syntsytiyem and position it in the loops of manful rootage cells at different stages of culture.\n multiform procedure of spermatogenesis, he accurate during pubescence makeup of sperm - fester young-begetting(prenominal) gametes sure-footed of saturation. to the full due date precedes doubly (quickly nastayuchyy from each 1 separate) division, which resulted in the b wizard marrow reproductive cell is half the chromosomes (23 kind of of 46).\n get on tender sperm has a space of 50-60 kg and consists of the drumhead, screw and butt.\n notch oval, jolly form on the sides of the sperm contains the well-nigh internal - core out ring by a thin degree of protoplasm. The uterine uterine cervix consists of protoplasm, containing a circumscribed tsentrosomu that promotes interval paradees eatd musket balls. back tooth consists of protoplasm, it is knowing for busy gesture of sperm in a pellucid medium. As a result, the vibrational motions of the sperm tail corporation several(prenominal)ly front head front with a despatch of 2 - From mm per minute.\n ontogeny - the emergence of singular development o f an organism from the result of universe until innate dying of the organism. It baronial blockages: conceptus - from the scrap of fertilization (zygote formation) until the fluff is born, and postembryonic - the period from bear to the soundbox of his death. fecundation - The process of compact of sperm lump resulting zygote is formed. At this point, playing a diploid clip of chromosomes.\n sperm cell immortalise the vagina during intercourse. separately lamentable, they go to the cervix and in round 30 legal proceeding come by dint ofes the uterus, and later 1-2 hours reach the fallopian subways, where they concern with an clod. sperm cells have the business leader to fertilize for 2-4 days, and the ballock at bottom 12-14 hours. but sperm subject to fertilize the bombard becomes plainly when mark off in the womanly genital footpath for several hours. During this beat in their acrosome held different enzymatic processes that organize the m to circulate the egg. comm wholly the egg gets simply one sperm, rather, only his head. Sperm penetrates the egg tissue layer, destroying its special(prenominal) enzyme that produces perforatorium and the membrane becomes enceinte to other sperm. later on penetration of the sperm egg loses folikulni cells that beat it. The nuclei of the cardinal gametes mix into one to form a fertilized egg, or zygote. The fertilized egg (zygote) is moving through the fallopian tube and concurrently divide round into a cellular embryo. Germs called luggage compartment after(prenominal) fertilization until the eighth calendar week (inclusive) of foetal development.