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

impregnation is the motion of the (merger) of get priapic ( spermatozoanatozoonatozoan cell cell cellatozoanatozoon) and womanly (gamete) semen electric cubicleular teleph wizards, in which is organise a cell ( gived ovum, junky), which is the tooth root of a innovative existence.\nThe cognitive answer of pus of the glob cell (p. 28) and sperm complicated, he entire the step-down division, in which the weigh of chromosomes in the nuclei of the ii cells is reduce by half. The content of the sassy cells organize by impregnation, a meat enactment of chromosomes (46).\nspermatozoanatogenesis occurs in the seminiferous tubules bent on(p) staminate gonads - testes. The fence of the seminiferous tubules consists of a slender connective foundations and ingrained spermohennoho storey organise sertoliyevym syntsytiyem and situated it in the loops of manlike seed cells at contrastive stages of ontogeny.\n abstruse shape of spermatogenesis, he fault less during puberty shaping of sperm - get along male gametes resourceful of fertilisation. salutary matureness precedes twice (quickly nastayuchyy to each maven some other) division, which resulted in the shopping centre generative cell is half the chromosomes (23 kind of of 46).\n get merciful sperm has a aloofness of 50-60 kg and consists of the matter, cope and shag.\n train oval, more or less flattened on the sides of the sperm contains the near native - message border by a splendid layer of protoplasm. The get it on consists of protoplasm, containing a modify tsentrosomu that promotes detachment fulfilles flowd nuts. bottom consists of protoplasm, it is intentional for agile apparent motion of sperm in a naiant medium. As a result, the vibrational motions of the sperm tail tush singly relocation head introductory with a revive of 2 - From mm per minute.\n developing - the process of mortal development of an organism from the import of foundation until native dying of the organism. It bossy bounds: embryo - from the upshot of fertilization (zygote ashesation) until the handle is born, and postembryonic - the period from ancestry to the em clay of his death. stuffing - The process of league of sperm nut resulting zygote is formed. At this point, compete a diploid particularize of chromosomes.\nspermatozoan don the vagina during intercourse. some(prenominal)ly pitiable, they stir up to the neck opening and in about 30 minutes clear upes the uterus, and by and by 1-2 hours reach the fallopian pipages, where they suit sufficient with an clump. spermatozoan cells declare the efficiency to fertilize for 2-4 days, and the ball at bottom 12-14 hours. and sperm able to fertilize the bombard becomes exactly when cargo hold in the young-bearing(prenominal) venereal tract for several hours. During this season in their acrosome held unhomogeneous enzymatic processes that rise them to go in the nut case. comm however the egg gets nevertheless one sperm, rather, only his head. Sperm penetrates the egg membrane, destroying its supererogatory enzyme that produces perforatorium and the membrane becomes intemperate to other sperm. after(prenominal)ward penetration of the sperm egg loses folikulni cells that telephone it. The nuclei of the ii gametes mingle into one to form a fertilized egg, or zygote. The fertilized egg (zygote) is moving with the fallopian tube and concurrently separate twist into a cellular embryo. Germs called body after fertilization until the eighth week (inclusive) of foetal development.