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Fiche maturation des spermatozoides
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Fiche sur le cours de maturation des spermatozoides en biocellulaire en PASS à l'uB en a partir de mes notes de cours et du cours d'une prépa
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BiocellulaireMaturation des spermatozoïdes
I. Rappel appareil genital masculin
Rôle endocrine : production androgène (testostérone par cellule de Leydig).
Rôle exocrine : produit, nourrit et stocke les gamètes mâles haploïdes.
Appareil de la reproduction : émet suspension spermatozoïdes dans voies génitales
féminines.
Scrotum contient penis et testicules ( partie intratubulaire exocrine et extratubulaire
endocrine). Voies spermatiques composées de 2 épididymes (→alpha glucosidase), 2
canaux déférents, 2 canaux éjaculateurs (union ampoule déférentielle et vésicule séminale)
et urètre assurent transport et maturation des spermatozoïdes. Glandes annexes
regroupent les 2 vésicules séminales (→ fructose), la prostate (entoure de 2 sphincter lisse
et strié, → acide citrique) et les glandes de Cowper (= bulbo-urétrales). Sperme = liquide
séminal (acellulaire) + spz et cellules rondes de lignée germinale (cellulaire), pH = 7, qu’au
moment de l'éjaculation (se rencontre pas avant).
Testicules : organes pairs ovoïdes
entouré d’une coque fibreuse =
albuginée dont la température
doit être de 34-35°C donc ils se
trouvent à l'extérieur de
l’organisme = s' ils descendent
mal il y a une alteration de la
spermatogenèse (cryptorchidie =
non descente), volume de 12-15
mL reflétant la production de spz.
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