03 gametogenesis 1
TRANSCRIPT
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Gametogenesis 1
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A. Spermatogenesis
Spermatogenesis
- Spermatositogenesis- Spermatositogenesis
- Spermiogenesis- Spermiogenesis
Pengendalian spermatogenesis
- Hormonal- Hormonal
- Feed Back Machanism- Feed Back Machanism
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SPERMATOGENESISSPERMATOGENESIS
- Proliferasi Proliferasi - Tumbuh SpermatositogenesisTumbuh Spermatositogenesis- MatureMature- TrasnformasiTrasnformasi == SpermiogenesisSpermiogenesis
MetamorfosaMetamorfosa
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SpermatogoniumSpermatogonium Spermatid : Spermatositogenesis Spermatid : SpermatositogenesisSpermatid Spermatid Spermatozoa : Spermiogenesis Spermatozoa : Spermiogenesis
- aparatus golgi- aparatus golgi Akrosom Akrosom- inti- inti kepala spermatozoa kepala spermatozoa- sentriol- sentriol ekor spermatozoa ekor spermatozoa- plasma membran- plasma membran selubung tubuh selubung tubuh- mitokondria- mitokondria berkumpul di ekor berkumpul di ekor
Spermatogonium- dekat lamina basalis, besar bervariasi- dekat lamina basalis, besar bervariasi- inti bulat lonjong, + butir-butir kromatin- inti bulat lonjong, + butir-butir kromatin- nukleoli dekat selaput inti- nukleoli dekat selaput inti- sitoplasma granuler, < jelas- sitoplasma granuler, < jelas- HE = inti bulat, biru (kadang-kadang mitosis)- HE = inti bulat, biru (kadang-kadang mitosis)
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Spermatosit Primer- Produk akhir spermatogonium B- Produk akhir spermatogonium B- inti paling besar, sentral- inti paling besar, sentral- interfase = (+) butir-butir kromatin halus - interfase = (+) butir-butir kromatin halus
dan ratadan rata
Spermatosit Sekunder- produk meiosis I- produk meiosis I- sel tampak bulat - sel tampak bulat ~ ~ spermatogoniumspermatogonium- inti bulat, sentral- inti bulat, sentral- interfase = Inti seperti Spermatosit primer- interfase = Inti seperti Spermatosit primer
dengan spermatid mudadengan spermatid muda
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Spermatid- produk meiosis II- produk meiosis II- hampir berbatasan dengan lumen tubulus seminiferus- hampir berbatasan dengan lumen tubulus seminiferus- inti eksentris, lonjong- inti eksentris, lonjong- berkelompok 4 – 8- berkelompok 4 – 8- daerah golgi dekat inti, berbatas tidak jelas- daerah golgi dekat inti, berbatas tidak jelas- mitokondria (butir-butir >>) dalam membran sitoplasma- mitokondria (butir-butir >>) dalam membran sitoplasma
SpermatozoaTubulus seminiferus Tubulus seminiferus berkala berkala dewasa kelamin dewasa kelamin- mamalia = 50 – 60 - mamalia = 50 – 60 µµ- kepala- kepala leherleher ekor = - pangkalekor = - pangkal
- tengah- tengah - ujung- ujung
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Pergerakan =Pergerakan = ekor dan kepala ekor dan kepala
terpisahterpisah fibril-fibril luar kepala fibril-fibril luar kepala
kontraktilkontraktil fibril-fibril halus kepala fibril-fibril halus kepala
impuls ritmikimpuls ritmik
Kecepatan pergerakan Kecepatan pergerakan spermatozoa spermatozoa tergantung lingkungan, tergantung lingkungan, suhu 37suhu 37ooC = 100 C = 100 µµ / det / det
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Sel Sertoli- sel penyokong, sel sustentakular, nurse sel- sel penyokong, sel sustentakular, nurse sel- relatif sedikit, sepanjang Tubulus seminiferus.- relatif sedikit, sepanjang Tubulus seminiferus.- sel-sel tinggi dengan dasar lamina basalis- sel-sel tinggi dengan dasar lamina basalis- bentuk tidak teratur, kompleks = kepala spermatozoa- bentuk tidak teratur, kompleks = kepala spermatozoa- cekungan sitoplasma- cekungan sitoplasma- inti pucat, lonjong- inti pucat, lonjong- anak inti = jelas- anak inti = jelas sentralsentral = asidofil= asidofil
tepitepi = basofil= basofil
Sel Leydig- interstitial sel- interstitial sel- berkelompok pada - berkelompok pada ∆∆ Tubulus seminiferus. Tubulus seminiferus.- sel besar, sitoplasma bervakuola (>> lipid)- sel besar, sitoplasma bervakuola (>> lipid)- inti = + butir-butir kromatin kasar (2)- inti = + butir-butir kromatin kasar (2)- retikulum endoplasma agranuler- retikulum endoplasma agranuler
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FAKTOR-FAKTOR YANG FAKTOR-FAKTOR YANG MEMPENGARUHI MEMPENGARUHI
SPERMATOGENESISSPERMATOGENESIS
•Obat-obatan•Bahan kimiaBahan kimia•Sinar rontgenSinar rontgen•Trauma Trauma mekanismekanis•PenyakitPenyakit
•Hormonal- Hipotalamus- Hipotalamus- Hipofisa- Hipofisa- Testis- Testis
•Lingkungan- Temperatur- Temperatur- Dataran Tinggi- Dataran Tinggi
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