Structure and function of the sperm

Structure and function of the sperm
Sperm similar to tadpole, the intersection of the total length and about 66 �� m, separately, the intersection of tail and two part. It is shown in oval that the head is positive, the side takes the form of pear, include a piece of nucleus and pieces of body with very dense chromatin. It is that a kind of membrane is a cell device to carry the body, take the form of the cap cover in front of nucleus. Carry and include many kinds of hydrolase such as hyaluronnidabe, carry body enzyme and acid phosphatase etc. in the body, it is equivalent to enormous lysosome. The centre of the end includes an axle silk (similar cilia) which runs through the whole tail ,The midsection contains mitochondria that the spiral arranged. It is main in the sperm one function for before and not fertilize ovum in sport,have materials hereditary lasted egg mother cell thereby. At the time of sexual intercourse, the seminal fluid is kicked into the vagina, the sperm swims out of the precise thick liquid, passes through cervix uteri, uterus, oviducal gorge department, reach belly and egg mother cell of oviducal pot finally and meet. Woman are fill stickier liquid in the intersection of reproduction and dish, the mucous membrane of oviducal gorge department forms the winding pleat, the transportation of this pair of sperms forms resistance greatly, plays a role in eliminating and screening the sperm too, only the sperm with very strong movement ability and appropriate movement way could reach egg mother cell's position. The environment of women's reproduction one of onset of ovulation still regulates the function of sperm's function playing, the sperm is fertilized ability at the same time in the course of transporting, the latent nest can store sperms and prevent the sperm that already can obtain produces a of body to reflect too early temporarily among the oviducal gorge department pleats. To fertilize ability until women invite, can keep 1 d in the the intersection of reproduction and line sperm.It can mean the sperm is in order that a series of physiological change course which is fertilized ability that the sperm obtains. Sperm begin, can obtain the process wear cervix uteri. When reaching oviducal gorge portion, obtain can the course has been close finishing. Can obtain the back-end sperm happens " Exceed and activate " ,Namely the sports of drawing a design of the strong whip appear, the swing ranges of the head, end are strengthened notably, the direction of moving makes too flexibly and changeably, make the sperm pass through the oviducal gorge portion. Meanwhile, the intersection of cell membrane and stability of department of sperm reduce, the intersection of cell membrane and some surface, and accurate to cut the relevant receptor to expose, possess with egg mother cell going on, interacting and producing of terms that body reacting.It is structure function changes taken place after a sperm can obtain to finish to carry the body and react, the afterbirth similar to body cells vomits the phenomenon. When the sperm begins a of body to happens and reacts, carry the body and swell at first, cell membrane and very external membrane of the sperm stick to closely, happen, merge a bit more, merge place break, carry body communicate with the intersection of sperm and outside through break mouth, carrying hydrolase in the body content thing is activated and spread out surface of sperm's head through the breach, very internal membrane is exposed. It is a key change of a sperm when fertilized to carry the body and react, only finishes a sperm whose body reacts to merge with the egg mother cell, realize and is fertilized.
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