Form, basa uye kukura urume sero

Pregnancy ari munhukadzi muviri kunoitika zvichiguma kwemapazi maviri gametes. Mumwe wavo anonzi urume, uye mumwe - zai. Chii kukura urume? Chii chinoratidza tinoberekwa utachiona Sero? Urume rakasiyana zai? Mhinduro dzemibvunzo yose iyi vachawanikwa.

Male dzokubereka nadzo

kubereka basa iri mumiririri mutumbi simba hafu yevanhu Vamwe omumuviri uye nhengo:

• manhu vane zvinoshandiswa;
• vas deferens;
• yeprostate;
• seminal vesicles;
• bulbourethral shwanu;
• scrotum;
• mboro.

All pamusoro apa pamwe vachinzi varume dzokubereka nadzo. It akaumba dzisingaoneki. Iri izwi rinoreva vanhurume masero vanokwanisa wekusangana. Kuburikidza nemunhu usina kuzvidzivirira dzisingaoneki siya hono pabonde maitiro uye kupinda munhukadzi muviri.

Mashandiro anoita masero kushandiswa

Dzisingaoneki - chivakwa umo majini mashoko ari vanhu zvirimo. Unoshanda kushandiswa mumasero omuviri vamwe varume:

• kwemutemo nhengo dzokubereka turakiti (ukuru uye nemamiriro urume womunhu kunoita kuti akunde zvipingamupinyi siyana);
• kupinda munzvimbo munhukadzi utachiona masero, inonzi zai;
• rinosandurwa majini zvinhu.

Zvinokosha kucherechedza kuti panguva madanana mumuviri mukadzi anowana dzisingaoneki. Inoitwa seminal mvura uye dzisingaoneki masero yakaturikwa mariri. Male utachiona masero ari urume rine rakakura chitsama. Asi akura zai iri hadzi muviri rinongova akasiyana. mukono utachiona masero mumwe chete anogona kuita zvose mitambo yayo. A rakakura mumabasa reDare ukuru uye chimiro urume.

The nemamiriro spermatozoon: musoro uye mutsipa

Nokuti vanhurume masero vari dzinoratidzwa dzakananga chimiro, izvo chinopa kukwanisa kufamba, kuti zai. Dzisingaoneki chinhu denderedzwa chivako ane refu flagellum. Chii sechivako sero? Saka, urume chinomiririrwa zvitatu zvinoti:

• musoro;
• pamutsipa;
• muswe.

Head - ichi mugove denderedzwa pamusoro urume. At pamusoro wayo ndiye acrosome. Saka akadana vesicle chaizvo zvinovaka muviri zvinodiwa kuti ovum kupinda kuburikidza unodzivirira mumuhara. Musoro rinewo tsanga. Inoramba hafu nhamba munhurume nemagene mashoko (DNA). Chimwe chezvinonhuwira musoro - the centrosome. It hwezvekukurukurirana kufamba muswe.

Chikamu chechipiri urume - payo kuti mutsipa. Chinhu fibrous nzvimbo unobatanidza musoro uye muswe. Chimiro Izvi tefa chaizvo. chinhu ichi inoita kufamba urume. With mukana wokushandiswa remusoro oscillates kumativi.

Sechivako urume muswe

Asati kutsanangura ukuru urume muchitokisi, zvakakodzera kufunga izvozvo chetatu - munhu flagellum. Inonzi muswe. Zvinosanganisira zvikamu akawanda:

1. Zvenguva. Ndicho panonyanyisa chikamu urume muswe. Rine zononoka mitochondrial rukoko unobereka simba nokuda kufamba munhurume utachiona sero.
2. Chief. mugove ichi nourume rine microtubules. Dzavo gobvu rokunze rukoko anofukidza fibers uye unodzivirira mumuhara.
3. End. On chikamu ichi unodzivirira kusangana nekutsi kwemukadzi dzisingaoneki uye gobvu fibers ave wakawondereiko kudai mazuva ose. Bemhapemha ndiyo nhete muchitokisi membrane.

Zvaakanga familiarized pamwe nemamiriro yokupedzisira chikamu urume, zvinganzi vakagumisa kuti muswe tapers zvishoma nezvishoma kubva chawo kusvika muromo. Nyaya iyi inopa bicheobraznye kwebasa gono nemasero embeu sezvo imi kufamba kuburikidza nhengo dzokubereka turakiti kunotsvaka ovum.

encombrements dzisingaoneki

Male utachiona masero iduku kwazvo. Ukuru dzisingaoneki hwevanhu sezvinotevera:

• masero Kureba - vanenge 55 microns;
• musoro kukwirira - 2,5 microns, upamhi - 3.5 neMM, urefu - 5.0 microns;
• cervix dzisingaoneki - anenge 4,5 microns pakureba;
• muswe kureba - 45 m.

masero Male utachiona haigoni kuonekwa pamwe chinoabatsira. Kukura urume anogona kuonekwa pasi magnification. Sezvawaimboita Leeuwenhoek. Muna 1677, akarondedzera spermatozoa. Scientist, amboita zvakawanikwa, yakandibvunza kuti masero aya urimowo muchangosangana. Zvisinei, kuti vanhu ruzivo haina ainyepa. Makore anenge 100, vanhu vanotenda dzisingaoneki parasitic tusingaoneki.

Paumbwe munhurume utachiona masero

On the mubvunzo panyaya chii saizi dzisingaoneki akapindura. Zvino zvakafanira kuti funga kuti masero aya aumba. Dzisingaoneki masero simuka uye vakura vari mumasero anokosha anonzi testes. zvivako izvi dziri mune scrotum. Inosanganisira akawandisa seminiferous tubules, mudungwe pamwe mumasero anokosha (spermatogonia). Sezvo vanhurume masero vari akaumba pano? Izvi kunotanga pakuyaruka:

• spermatogonia kamura;
• somugumisiro masero matsva;
• akura dzisingaoneki kuburikidza ari Sertoli masero, secreting dzakasiyana-siyana muviri.

Pfungwa inotungamirwa munhurume gametes anonzi spermatogenesis. Hazvisi zvakaoma. On paumbwe chikuru spermatocytes kwacho hakuiti kugumisa, nekuti masero akaonekwa kuri mune zvakakwana yakatarwa okutodza. Uyezve, masero aya achiona meiosis. Somugumisiro, pane spermatids nehafu nhamba okutodza. Masero zvishoma akure. Zvinoguma urume ruzivo.

Movement kwevarume utachiona masero

Funga basa uye kukura urume muchitokisi, unofanira uzive kuti zvepabonde sero unotii. Urume vari varume mumuviri, tiri vakaneta. Ivo tinyerere kufamba kuburikidza dzokubereka nadzo maturakiti. Movement miswe zvikuru vasingakoshi. Active dzisingaoneki Wana pashure kupinda munhukadzi muviri. Dzichimhanya kungava masendimita kupfuura 30 paawa.

Pashure ejaculation mumuviri womukadzi anowana dzisingaoneki vanopfuura mamiriyoni 300. Vazhinji vavo vakaurayiwa vari nyinyo nokuda zvisingafadzi. kwezvakatipoteredza. Vamwe utachiona masero makono anogona kuzadzisa mashoko remuromo mugero. Zvisinei, chikamu ichi njanji kwaanoda kuenda, kwete dzisingaoneki zvose. Chipingamupinyi kwavari kuwana remuromo madzihwa.

Nourume apfuura cervix, kupinda dumbu kuwa. Svikiro mumuviri uyu womumwoyo inosimudzira munhurume utachiona masero. Kubva pachizvaro vari kutumwa kune fallopian sepombi, apo muchangosangana kunoitika. Ongororo dzakaratidza kuti mishomanana zviuru dzisingaoneki kupfuura nenzira iyi.

The rakapedza dzisingaoneki upenyu

Sero inotungamirwa kunotora anenge 74 mazuva. Kunyatsovira uye ndima yavo kuburikidza ari epididymis uye vas deferens Zvinotora kumwe mazuva 26. Izvi zvinoratidza kuti dzisingaoneki anogona kuramba nguva refu muviri womunhu. Zvakasiyana pashure ejaculation. Urume utachiona masero arambe kushingaira asina kupfuura zuva (ya iyi kunoenderana zvimwewo zvinhu zvakadai ambient tembiricha, uwandu chiedza, mwando pamusoro).

In hadzi upenyu hupfupi angava akasiyana. Kana kumhanya kwebasa urume kunokanganisa kukura, ya nezvokuvapo ichi yakazvimirira. Somuenzaniso, muna nyinyo mukono utachiona masero vanourayiwa pashure 2 hr. Munguva dumbu uye fallopian sepombi zvakatipoteredza zvakawanda zvinoita kuti dzisingaoneki. Pano vanogona kuva kusvika 5 mazuva chinoshingaira neHurumende kutsvaka kana vakamirira zai.

Kuenzanisa dzisingaoneki mazai

In hono nguva kuumbwa uye vakura, itsva bonde masero. With chiito chimwe nechimwe kurara urume asunungurwa, ine guru yakawanda dzisingaoneki. Asi muviri womukadzi dzinokura mumwe chete pabonde sero rimwe kumwedzi (vanenge 28-30 mazuva).

Zvino zvakafanira kuti kuenzanisa kukura zai uye dzisingaoneki. Male gamete, sezvataurwa pamusoro apa, zviri dukuduku marongerwo. Zai akasiyana zvachose. saizi yaro ingabva 0,15 kusvika 0.25 mm. Uyewo kucherechedza ndechokuti zai ndee. Uyezve, ine hupfupi upenyu anotarisirwa. Mushure kusunungurwa ovary uye fallopian chubhu uchikurukura kunogona maawa anenge 24. Kana pakusangana hakuitiki, zai anofa.

In mhedziso, zvinokosha kuziva kuti ukuru urume sero iduku kwazvo. Pasinei neizvi, ine chimwe chinhu chinokosha basa randinogara mune pakusangana ari zai. Zvisinei, kuti aite izvi asingagoni dzisingaoneki zvose. Kamwe ari munhukadzi muviri, vanoenda kuburikidza dzinongoitika vakasarudzwa. Simba pamwe zvakaipa chivakwa masero kufa nokukurumidza pasina kusvika muchibereko chemusikana. Vamwe havambokwanisi nguva kuenda chinangwa. Chete uchitsanya uye kupfuura kushingaira dzisingaoneki, vadarika ose zvipingamupinyi yakawanikwa chinopinda zai awedzere pazviri ruzivo rwavo magene.