ʻO ka pae hea ka spermatogenesis?
Uaʻaeʻia eʻike i nā papahana 4 o ka spermatogenesis:
- Ka hana hou.
- Ka ulu.
- Maturation.
- Ke aʻoʻana.
Ua loaʻa i kēlā me kēia o lākou ka waiwai pono'ī a he mauʻanoʻano pilikino kekahi. I ka hoʻomakaʻana, pono e'ōleloʻia, he nui ka nui o nā pule i ka pahu hōʻike. I kēia manawa, he mau papa keʻokeʻo o nā pūnaewele o ka pā o kēlā me kēia o lākou, a ma keʻano he mau lālani kūlana o ka uluʻana o ka spermatozoa.
He aha ka hana i ka manawa o ka hānau hou?
ʻO ka pae waho o nā pūnaewele o nā seminulumrous tubules ke paniʻia nei e ka spermatogonia. ʻO kēia mau pūnaewele heʻano kepoe, me kahi kaha nui i hōʻikeʻia a me ka liʻiliʻi o ka cytoplasm.
Me ka hoʻomakaʻana o ka wā'ōpio, māheleʻia ka maheleʻoihana o kēia mau pūnaewele e ka mitosis. Ma muli o kēia, ua hoʻonui nuiʻia ka helu o ka spermatogonia i nā testes. ʻO ka manawa e kū ai ka maheleʻoi o spermatogonia ma keʻano ka manawa o ka hoʻoponopono.
He aha ka pae o ka uluʻana i ka spermatogenesis?
ʻO ka māhele o ka spermatogonia ma hope o ka neʻe muaʻana i ka lālā ulu, kahi e pili kokoke ana i ka lumen o ka'ōpala seminifrous. Aia ma kēia wahi he piʻi nui i ka nui o ke kelepani kamepiula, kahi i loaʻa i ka hoʻonuiʻana i ka nui o ka cytoplasm, ma ka mua. I ka hopena o kēia kau, ua hoʻokumuʻia nā spermatocytes o ka papa mua.
He aha ka hana i ka manawa o ka hānauʻana?
ʻO kēia wā o ka uluʻana o nā pūlili pūluma e hōʻikeʻia ana i ka hopena oʻelua mau māhele o ka wikiwiki. No laila mai kēlā me kēia spermatocyte o ka 1 kauoha, ua hoʻokumuʻia nā spermatocytes o 2 mau, a ma hope o ka maheleʻelua, he 4 spermatids nāʻano oval a me ka liʻiliʻi loa. Ma kahi o ka 4, ka hoʻokumuʻia o nā pūnaewele male - spermatozoa- kahi . I kēia hihia, loaʻa ka pūnaewele i kahiʻanoʻike: elongated, oval me ka hae hae.
No kaʻike maikaʻi aʻe i nā kūlana o ka spermatogenesis,ʻoi aku ka maikaʻi o ka hoʻohanaʻole i ka papaʻaina, akā, he mea iʻikeʻia e nānā i ka hana i loko o kēlā me kēia.
