Urume - chimiro, kugadzirwa, anomalies

Spermatozoa ndiwo masero echirume anodiwa pakuberekana kwepabonde. Muvarume, vane hurefu hunosvika 60 microns uye vanoumbwa mukuita spermatogenesis. Inotora mazuva angangoita gumi nematanhatu, asi zvinotora mwedzi miviri kugadzira mbeu yese yakura. Kana zvirwere zvikaitika panguva yekutanga, kunaka kwembeu kunogona kuderera.

1. Urume - chimiro

Yakakwana yakakwana spermatozoa inoumbwa ne musoro nemutsipa uye kureba kwavo kunosvika 60 µm. Musoro wesperm une oval in shape. Hurefu hunenge 4-5 microns, hupamhi 3-4 microns. Mukati, ine nucleus yesero ine DNA uye acrosome. Iyo acrosome ine proteolytic enzymes inotarisirwa kupinda kuburikidza neyakajeka membrane yemasero echikadzi. Vitek chinhu chinokonzera kufamba kwespermatozoa. Ichi chinhu chine mutsipa uye chinopinza. Mutsipa ndiyo chikamu chekutanga che twine uye inobatanidza musoro wembeu kune imwe twine. Kupinza, kune rumwe rutivi, ndechimwe chinhu chisingaoneki chechimiro chembeu.

2. Urume - kugadzirwa

Kugadzirwa kwe spermatozoa muvarume kunonzi maitiro spermatogenesis. Munguva yekuyaruka kwevakomana, masero anoumbwa museminal tubes kubva ku stem cell mushure me mitosis, iyo inonzi. spermatogonia. Iyo follicle-stimulating hormone inobva yakonzera kupatsanurwa ne mitosis. Panguva ino, pane spermatocytes anoronga XNUMX. Zvadaro, maspermatocyte ekutanga anopinda maitiro e meiosis umo anoumbwa spermatocytes anoronga XNUMX.

Aya masero anoenda kuburikidza nekuita meiosis zvakare uye fomu urume. Ipapo vanoshanduka kuita spermatozoa ine haploid nhamba yekromosomes. Munguva yese iyi, huwandu hwe cytoplasm uye nhamba ye cell organelles inoderera. Iyo nucleus yesero inotora chimiro chemusoro, uye chikamu cheGolgi apparatus chinoshandura kuita acrosome ine ma enzymes anodiwa kuti apinde muzai.

Iyo yese nzira ye spermatogenesis iri pasi pekutonga kwehomoni ye testosterone, uye kutenderera kwakazara kwemunhu spermatogenesis kunotora anenge 72-74 mazuva.

3. Urume - anomalies

Spermatozoa ndiwo masero anodiwa pakugadzirisa. Nekudaro, kune akasiyana abnormalities anogona kukanganisa maseru aya, zvichikonzera kusabudirira kuedza kubata pamuviri. Pakati pekutyorwa uku, munhu anogona kusarudza izvo zvinosanganiswa nechimiro chisina kujairika, huwandu, huwandu hwehurume hunogadzirwa kana kufamba. Kana iri chimiro che spermatozoa, kukanganisa kunogona kukanganisa zvinhu zvose zvechimiro chavo uye inonzi teratozoospermia. Zvichipa huwandu hwesperm mune ejaculate, zvinotevera zvinogona kucherechedzwa: azoospermia (kusavapo kwe spermatozoa mu ejaculate), oligospermia (yakanyanya kuderera urume huwandu muejaculate) uye cryptozoospermia (apo chete spermatozoa imwe chete inoonekwa mu ejaculate). Zvinetso zveSemen volume zvakakamurwa kuita: aspermia (kana isingasviki 0,5 ml yesperm inoburitswa mune imwe ejaculation), hypospermia (kana mari yacho iri pasi pe2 ml); hyperspermia (apo huwandu hwesperm hunopfuura 6 ml). Asthenozoospermia ishoko rinoshandiswa kutsanangura abnormal sperm motility, nepo maererano nemirau yazvino, inodarika 32% yembeu inofanira kuratidza kufambira mberi.

Onawo: Vanhu vakamirira rufu here? Urume huri kupera

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