Spermatogenesis: ke eng le hore na mekhahlelo e meholo e etsahala joang

Litaba

• Mekhahlelo e meholo ea spermatogenesis
• 1. Karolo ea ho mela
• 2. Karolo ea kholo
• 3. Karolo ea ho butsoa
• 4. Karolo ea phapang
• Mokhoa oa spermatogenesis o laoloa joang

Spermatogenesis e tsamaellana le ts'ebetso ea ho theha peo ea botona, e leng likarolo tsa banna tse ikarabellang bakeng sa ho emolisa lehe. Ts'ebetso ena hangata e qala ho tloha lilemong tsa 13, e ntse e tsoela pele ho pholletsa le bophelo ba monna le ho fokotseha botsofaling.

Spermatogenesis ke ts'ebetso e laoloang haholo ke lihormone, joalo ka testosterone, luteinizing hormone (LH) le follicle e hlohlelletsang hormone (FSH). Ts'ebetso ena e etsahala letsatsi le leng le le leng, e hlahisa likete tsa peo ka letsatsi, tse bolokiloeng ka har'a li-epididymis kamora hore e hlahisoe testis.

Mekhahlelo e meholo ea spermatogenesis

Spermatogenesis ke ts'ebetso e rarahaneng e nka matsatsi a pakeng tsa 60 le 80 mme e ka aroloa ka mekhahlelo e 'maloa:

1. Karolo ea ho mela

Karolo ea ho mela ke karolo ea pele ea spermatogenesis mme e etsahala ha lisele tsa likokoana-hloko tsa nako ea embryonic li ea masaleng, moo li lulang li sa sebetse li bile li sa hola, 'me li bitsoa spermatogonias.

Ha moshanyana a kena bohlankaneng, peo ea botona, e tlasa tšusumetso ea lihormone le lisele tsa Sertoli, tse kahare ho testis, li hola haholo ka likarolo tsa li-cell (mitosis) ebe li hlahisa li-spermatocyte tsa mantlha.

2. Karolo ea kholo

Li-spermatocyte tse ka sehloohong tse thehiloeng mohatong oa ho mela li eketseha ka boholo mme li ea ts'ebetsong ea meiosis, e le hore liphatsa tsa bona tsa lefutso li kopitsoe, li tsejoe e le li-spermatocyte tsa bobeli.

3. Karolo ea ho butsoa

Kamora ho theoa ha spermatocyte ea bobeli, ts'ebetso ea ho nonoa e etsahala ho hlahisa spermatoid ka karohano ea meiotic.

4. Karolo ea phapang

E tsamaisana le nako ea phetoho ea peo ea botona hore e be peo ea botona, e nkang matsatsi a ka bang 21. Nakong ea phapang, e ka bitsoang spermiogenesis, ho thehiloe likarolo tse peli tsa bohlokoa:

• Acrosome: ke sebopeho se teng hloohong ea peo ea botona se nang le li-enzyme tse 'maloa' me se lumellang peo ea botona ho phunyeletsa lehe la mosali;
• Seoa: sebopeho se lumellang botona ho tsamaea.

Leha e na le flagellum, peo ea botona ha e na motility ho fihlela e tšela epididymis, e fumana matla a motility le manyolo pakeng tsa lihora tse 18 le 24.

Mokhoa oa spermatogenesis o laoloa joang

Spermatogenesis e laoloa ke lihormone tse 'maloa tse sa rateng feela kholo ea litho tsa botona le botšehali, empa hape le tlhahiso ea peo. E 'ngoe ea lihormone tse ka sehloohong ke testosterone, e leng hormone e hlahisoang ke lisele tsa Leydig, e leng lisele tse teng testis.

Ntle le testosterone, hormone ea luteinizing (LH) le follicle e susumetsang li-hormone (FSH) le tsona li bohlokoa haholo bakeng sa tlhahiso ea peo, kaha li hlohlelletsa lisele tsa Leydig ho hlahisa lisele tsa testosterone le Sertoli, e le hore ho be le phetoho ea spermatozoa ho spermatozoa.

Utloisisa hore na li-hormone tsa tsamaiso ea banna ea ho ikatisa li sebetsa joang.