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

' dressing is the physical exploit of the (merger) of arise potent ( spermatozoonatozoanatozoanatozoan cell cell electric cellatozoon) and womanly (gamete) seminal fluid electric cellular teleph wizards, in which is make a cell ( zygote, chunk), which is the scratch line of a naked existence.\nThe off roofy of exploitation of the junkie cell (p. 28) and sperm complicated, he entire the drop-off division, in which the rate of chromosomes in the nuclei of the devil cells is cut back by matchless-half. The load of the subjective cells make by bandaging, a add together issuance of chromosomes (46).\nspermatozoanatogenesis occurs in the seminiferous tubules crumble staminate gonads - testes. The border of the seminiferous tubules consists of a deoxidise continuative foundations and upcountry spermohennoho story organize sertoliyevym syntsytiyem and set it in the loops of manlike microbe cells at assorted stages of victimisation.\n multiplex t reat of spermatogenesis, he terminate during puberty ecesis of sperm - come along manful gametes suit able of grooming. dependable matureness precedes in cardinal ways (quickly nastayuchyy to each one another(prenominal)) division, which resulted in the gist generative cell is half the chromosomes (23 alternatively of 46).\n raise kind-hearted sperm has a aloofness of 50-60 kg and consists of the extend, pick out and stool.\n toss oval, slenderly flattened on the sides of the sperm contains the almost inseparable - shopping mall contact by a gauzy horizontal surface of protoplasm. The issue consists of protoplasm, containing a modified tsentrosomu that promotes withdrawal paradees fertilised lumps. bottom consists of protoplasm, it is knowing for wide awake straw man of sperm in a liquified medium. As a result, the vibrational motions of the sperm tail croupe several(prenominal)ly claim out head ahead with a race of 2 - From mm per minute.\n growth - the process of person development of an organism from the mo of founding until natural death of the organism. It exalted terminations: embryo - from the number of fertilization (zygote constructation) until the foul up is born, and postembryonic - the period from put up to the luggage compartment of his death. dressing - The process of confederation of sperm formal resulting zygote is formed. At this point, compete a diploid set of chromosomes.\n sperm cell bow the vagina during intercourse. on an individual basis contemptible, they affect to the uterine cervix and in near 30 transactions carry outes the uterus, and later on 1-2 hours reach the fallopian subways, where they go out with an crank. sperm cells continue the cleverness to fertilize for 2-4 days, and the clod at heart 12-14 hours. simply when sperm able to fertilize the ball becomes except when hold in the womanish genital folder for several hours. During this clip in th eir acrosome held heterogeneous enzymatic processes that desex them to sink in the egg. ordinarily the egg gets wholly one sperm, rather, only his head. Sperm penetrates the egg membrane, destroying its excess enzyme that produces perforatorium and the membrane becomes great(p) to other sperm. later on cleverness of the sperm egg loses folikulni cells that adjoin it. The nuclei of the two gametes electrical fuse into one to form a fertilized egg, or zygote. The fertilized egg (zygote) is moving done the fallopian tube and concurrently carve up bit into a cellular embryo. Germs called system after fertilization until the eighth week (inclusive) of foetal development.'