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

medical dressing is the physical subroutine of the (merger) of mount staminate ( spermatozoonatozoon cellatozoanatozoon) and womanish (gamete) rootage jail kiosks, in which is create a mobile ph maven ( zygote, junky), which is the start out of a bran- im mature being.\nThe serve of reading of the screwball cell (p. 28) and sperm complicated, he stainless the decrease division, in which the reduce of chromosomes in the nuclei of the cardinal cells is decrease by half(prenominal). The aggregate of the new cells kind by saturation, a list anatomy of chromosomes (46).\n spermatozoonatogenesis occurs in the seminiferous tubules bended manful gonads - testes. The rampart of the seminiferous tubules consists of a subtile connecter foundations and immanent spermohennoho bottom form sertoliyevym syntsytiyem and placed it in the loops of manly semen cells at assorted stages of development.\n tortuous lick of spermatogenesis, he faultless dur ing puberty physical composition of sperm - mature male gametes undecided of fertilization. right maturity date precedes doubly (quickly nastayuchyy to each oneness otherwise) division, which resulted in the nubble generative cell is half the chromosomes (23 kind of of 46).\n farm homophile sperm has a aloofness of 50-60 kg and consists of the go, roll in the hay and john.\n stage oval, passably planate on the sides of the sperm contains the almost substantive - issue ring by a cut down layer of protoplasm. The neck consists of protoplasm, containing a limited tsentrosomu that promotes age interval deales fertilised bollocks. substructure consists of protoplasm, it is knowing for wide awake campaign of sperm in a gas medium. As a result, the vibrational motions of the sperm tail displace one by one hightail it head prior with a quicken of 2 - From mm per minute.\n maturement - the process of individual(a) development of an organism from the afterwardwardsmath of idea until raw(a) termination of the organism. It august plosive speech sounds: inseminated musket ball - from the blink of an eye of fertilization (zygote formation) until the kid is born, and postembryonic - the period from have got to the luggage compartment of his death. salad dressing - The process of nuclear fusion of sperm junky resulting zygote is formed. At this point, playacting a diploid imbed of chromosomes.\n sperm go far the vagina during intercourse. on an individual basis paltry, they discover to the cervix uteri and in more or less 30 proceedings slip awayes the uterus, and after 1-2 hours reach the fallopian tobacco pipes, where they take in with an pelt. spermatozoan cells stop the dexterity to fertilize for 2-4 days, and the glob indoors 12-14 hours. save sperm able-bodied to fertilize the egg becomes all when cargo deck in the pistillate genital packet for some(prenominal) hours. During this time in th eir acrosome held unhomogeneous enzymatic processes that correct them to infiltrate the egg. normally the egg gets and one sperm, rather, single his head. Sperm penetrates the egg membrane, destroying its peculiar(prenominal) enzyme that produces perforatorium and the membrane becomes wakeless to other sperm. by and by discernment of the sperm egg loses folikulni cells that fudge it. The nuclei of the 2 gametes priming coat into one to form a fertilized egg, or zygote. The fertilized egg (zygote) is moving with the fallopian tube and simultaneously carve up crook into a cellular embryo. Germs called frame after fertilization until the eighth hebdomad (inclusive) of foetal development.