大连医科大学：《组织胚胎学》课程教学课件（英文讲稿）17.Male reproductive system

MaleReproductiveSystem

Male Reproductive System

Components:BladderTestesProstateGenital ducts:AmpullaEpididymis,Seminal vesicleDuctus deferens,EjaculatoryductEjaculatory ductsBulbourethralglandUrethraDuctus deferensAccessory glands:Seminal vesicles,Prostate,EpididymisBulbourethralglandMediastinumtestisPenisFunction:

Components: Testes Genital ducts: Epididymis, Ductus deferens, Ejaculatory ducts Urethra Accessory glands: Seminal vesicles, Prostate, Bulbourethral gland Penis Function:

RetetestisDuctusefferentesTubuli rectiTestesSeminiferoustubuleI . General structure:Tunicavaginalistunica vaginalisiscapsule→ tunica albugineamediastinumtestisTesticularlobuleparenchymatesticularlobules.Tunicaseminiferous tubulesgineaDuctusepididymisinterstitiumTubuli rectitubuli rectiretetestis

1. Testes Ⅰ. General structure: tunica vaginalis tunica albuginea mediastinum testis capsule parenchyma testicular lobules. seminiferous tubules interstitium tubuli recti rete testis

II. Seminiferous tubules-seminiferous epiSpermatogeniccellsSertolicellsBasementmembraneC.T. ..-- Myoid cells0福

Ⅱ. Seminiferous tubules seminiferous epi. Spermatogenic cells Sertoli cells Basement membrane C.T. - Myoid cells

A.Spermatogeniccellsspermatogonium→ primary spermatocyte secondaryCytoplasmic bridgesLate spermatidEarly spermatids店EarlyspermatidSecondaryspermatocytesSertolicellMeiosisSertolicellPrimaryspermatocyte號SpermatogoniumBasallamina-店福FibroblastspermatogenesisMyoid celsCapillaryCapillary囍Including3phases:Interstitial cells

A. Spermatogenic cells spermatogonium→ primary spermatocyte → secondary spermatocyte → spermatid → spermatozoon spermatogenesis Including 3 phases:

①.Spermatocytogenesis:MitosisSpermatogoniaprimaryspermatocytes②.Meiosis:Meiosis I+2secondaryspermatocytesprimary spermatocyte?Meiosis II+4spermatids(44+X+Y)③.Spermiogenesis(44+X+Y)田(22+XorY)no divisionSpermatidsspermatozoaY-(22+XorY)Modifystructure&shape(22+XorY)

Spermatogonia primary spermatocytes primary spermatocyte 2 secondary spermatocytes 4 spermatids ①. Spermatocytogenesis: ②. Meiosis: Mitosis Meiosis Ⅰ Meiosis Ⅱ ③.Spermiogenesis Spermatids spermatozoa no division Modify structure& shape

TypeAspermatogonia(stemcells)TypeBspermatogonia(progenitorcell)44+X+Y(2nDNA)Mitosis(Spermatocytogenesis）44+X+Y(4nDNA)PrimaryspermatocytesFirstmeiotic divisionSecondaryspermatocytes22+X/Y (2nDNA)00Secondmeioticdivisior00000000000022+X/Y(1nDNA)HesloualpoolesSpermatidsSpermiogenesisResidualbodiesSpermatozoa

44+X+Y (2n DNA) 44+X+Y (4nDNA) (Spermatocytogenesis) 22+X/Y (2nDNA) 22+X/Y (1nDNA)

Prophaseofthefirstmeiosisprimaryspermatocytereplicate46,XYDNA46,XY(4nDNA)(2nDNA)SecondaryspermatidspermatocytetelophaseMetaphaseThesecond meiosis-anaphaseWithoutreplicationofDNA23,X/Y23,X/Y(1nDNA)(2nDNA)UD

精原细胞 初级精母细胞 Prophase of the first meiosis replicate DNA primary spermatocyte 46,XY (4nDNA) 46,XY (2nDNA) 次级精母细胞 精子细胞 精子 The second meiosis Without replication of DNA Secondary spermatocyte telophase spermatid Metaphase -anaphase 23,X/Y (2nDNA) 23,X/Y (1nDNA)

no divisionSpermatidsspermatozoaModifystructure&shapeAcrosomalgranuleAcrosomalvesicleAcrosomalcapAcrosomeGolgiNucleusNucleusaS食RMiddleOUDOpiece86CentriolesMitochondrionResidualbodiesMitochondriaAcrosomeaS5m公05μm50μm5μm5μmHeadEndpiecePrincipalpieceMiddlepiece

Spermatids spermatozoa no division Modify structure& shape

.Spermatogonium&Spermatocytogenesis:LM: round & small, near the basalla46inXY)&2nDNATypeAspermatogoniaTypeAorTypeBsperma2Primary spermatocytesType B spermatogoniatypes:(mitosis)SpermatidTVDBAOr?SD务1TpeBsp味福品福PrimaryMitosisSpermatocyte福5evv力Myoid CellMXPrimary spermatocyteFirst meiotic divisiorNucleus福ooo0deSecondmeicticdiviskAcrosomal900086600eVesicle中Residual bodiesSoermatdInterstitilalySpermatogoniumCell福Sertoli CellResidusl bodiesXMatrixNucleus

①. Spermatogonium & Spermatocytogenesis: LM: round & small , near the basal lamina 2 types: Type A spermatogonia Type A or Type B spermatogonia Type B spermatogonia Primary spermatocytes (mitosis) (46 , XY) & 2n DNA