Lub vas deferens yog ib qho khoom ua ke uas yog ib feem ntawm lub cev vas deferens ntawm epididymis thiab noob qes, nrog rau ib feem tseem ceeb ntawm cov epididymis. Cov kav dej no xaus rau ntawm kev sib tshuam nrog cov kwj dej hauv lub cev.
The vas deferens yog ib qho ntawm cov cuab yeej tseem ceeb rau kev tswj cov txiv neej kev ua me nyuam. Qhov kawg ntawm nws tsim ib lub ampulla nyob rau hauv daim ntawv ntawm ib tug spindle, uas yog ib feem ntawm lub caj pas prostate thiab converges nrog lub excretory kwj dej ntawm lub seminal vesicle. Txoj kev sib koom ua ke hu ua ejaculatory duct.
Length
Qhov ntev ntawm vas deferens yog 45 - 50 centimeters. Nyob rau hauv lub transverse seem, nws tsis ntau tshaj peb millimeters, thiab txoj kab uas hla ntawm lub lumen yog tsis ntau tshaj li ib nrab millimeter. Cov phab ntsa ntawm lub npe duct yog thickened, thiab nyob rau hauv no hais txog, nws yog yooj yim palpable nyob rau saum npoo ntawm spermatic qaum los ntawm scrotum mus rau lub nplhaib ntawm lub inguinal kwj dej.
Lub cev ntawm vas deferens yog qhov txaus siab rau ntau tus, yog li cia peb saib xyuas nws cov qauv.
Plaub ntu ntawm cov kav dej
raws licov ntaub ntawv saum toj kawg nkaus ntawm vas deferens, plaub ntawm nws lub chaw haujlwm yog qhov txawv:
- Thawj ntu hu ua thawj (qhov luv luv testicular part). Nws nyob tom qab lub noob qes, ze rau nws cov appendages. Qhov no yog qhov tsawg tshaj plaws, nyob rau sab nraum qab ntawm lub noob qes.
- Ntxiv mus, yog tias nce mus rau cranial (vertically), nws yuav ua raws li txoj haujlwm qaum. Nws yog nyob rau hauv lub spermatic qaum, ze rau nruab nrab ntawm nws cov hlab ntsha, thiab stretches mus rau lub inguinal nplhaib nyob rau saum npoo. Nws yuav tsum raug sau tseg tias cov qauv ntawm vas deferens yog qhov tshwj xeeb.
- Tom qab ntawd, cov duct nkag mus rau hauv lub qhov dej inguinal (inguinal part). Los ntawm cov uas, nws stretches los ntawm lub inguinal nplhaib, mus los ntawm lub me me pelvis, thiab tshwj xeeb tshaj yog, los ntawm nws sab phab ntsa mus rau sab qis mus txog rau thaum nws koom nrog lub excretory kwj dej ntawm lub seminal vesicle. Qhov seem ntawm lub duct no yog hu ua pelvic duct. Lub pelvic cheeb tsam (pars pelvina) pib los ntawm sab hauv ntawm qhov qhib inguinal kwj dej thiab xaus nrog lub caj pas prostate. Nws yog devoid ntawm choroid plexus thiab txuas mus los ntawm daim ntawv parietal ntawm lub peritoneal ib feem ntawm lub me me pelvis. Qhov kawg ntawm cov kav dej uas nqa cov noob yog nyob ze rau hauv qab ntawm lub zais zis thiab ua dav dua, zoo li lub ampulla.
- Lub vas deferens hauv thaj chaw pelvic yog nyob rau hauv qhov chaw retroperitoneal extraperitoneally (uas yog, tsuas yog hauv ib feem). Mus rau lub prostate los ntawm sab lateral (sab) nws hla lub ncej ntawm inferior epigastric artery, txuas nrog iliac hlab ntsha thiab cov hlab ntsha,hla ntawm lub qhov quav thiab lub zais zis, hla nrog lub ureter, nkag mus rau lub zais zis thiab mus txog lub hauv paus ntawm lub caj pas prostate, nyob ze ntawm tib lub duct ntawm lwm sab. Qhov davhlau ya nyob twg ntawm vas deferens yog dilated, spindle-puab, thiab tsim cov ampulla ntawm vas deferens.
Qhov ntev ntawm lub ampoule yog 30-40 millimeters, thiab nws qhov loj tshaj qhov transverse mus txog kaum millimeters. Nyob rau hauv qis distal (feem ntau nyob deb) ib feem ntawm lub nkoj, nws maj mam ua nqaim, nkag mus rau hauv cov tuab txheej ntawm cov qog prostate thiab txuas nrog lub excretory duct ntawm lub seminal vesicle.
Lub duct ib leeg hu ua ejaculatory duct. Ob tug ntawm lawv nkag mus rau lub prostatic urethra nyob ze ntawm lub seminal tubercle thiab mus rau hauv lub qis ib feem ntawm lub posterior cheeb tsam ntawm lub prostate. Qhov ntev ntawm txhua qhov ejaculatory ducts yog 2 cm. Lub puab txoj kab uas hla yog 1 hli nyob rau hauv nws thawj qhov chaw thiab 0.3 hli ntawm lub point ntawm nws nkag mus rau hauv lub urethra.
phab ntsa
Cov phab ntsa ntawm cov hlab ntsha uas nqa cov noob yog tsim los ntawm cov mucous, cov leeg nqaij thiab cov kab mob adventitious. Thawj ntawm lawv yog peb mus rau tsib longitudinal folds. Nyob rau hauv qhov chaw ntawm lub nkoj ntawm lub duct piav qhia, lub mucous daim nyias nyias tsim bay-zoo li tus tubercles, uas yog hu ua ampulla diverticula.
Cov leeg nqaij yog nyob rau sab nraud ntawm cov mucosa, nws yog tsim los ntawm cov txheej txheem sab hauv, nruab nrab thiab sab nraud ntev.cov leeg nqaij du. Cov leeg nqaij muab cov phab ntsa ntawm vas deferens nrog yuav luag cartilaginous ntom. Cov leeg nqaij daim nyias nyias ntawm cov hlab ntsha ntawm cov duct no tsis pom meej meej. Nyob rau sab nraud, nws cov phab ntsa yog tsim los ntawm ib qho adventitious membrane, uas smoothly nkag mus rau hauv cov txheej txheem txuas ntawm cov kav dej ib puag ncig.
Txoj kev ntawm lub kav dej
Los ntawm cov vas deferens, paub tab, tsis muaj zog spermatozoa nrog cov kua qaub acidic, raws li qhov tshwm sim ntawm kev cog lus ntawm phab ntsa duct, tawm ntawm epididymis thiab khaws cia rau hauv cov hlab ntsha. Nws yuav tsum tau muab sau tseg tias cov kua tam sim no muaj ib feem absorbed.
Kev muab cov duct thiab seminal vesicle nrog paj hlwb yog kev xav (qhov system no yog tsim los ntawm sab sauv thiab qis hypogastric plexuses), nrog rau parasympathetic (los ntawm lub plab pelvic splanchnic qab haus huv).
ntshav duct
Cov ntshav ntawm vas deferens (daim duab tau nthuav tawm hauv tsab xov xwm) tshwm sim vim yog ceg ntoo ntawm cov hlab ntsha, cov hlab ntsha nruab nrab ntawm lub qhov quav thiab cov hlab ntsha tsis zoo.
Lub vesicle seminal kuj tau muab los ntawm cov ceg ntawm cov hlab ntsha ntawm sab qaum thiab nruab nrab ntawm lub qhov quav thiab cov hlab ntsha tsis zoo.
Cov hlab ntsha ntawm cov hlab ntsha ntawm cov txiv neej kev ua me nyuam nkag mus rau plexus ntawm cov hlab ntsha ntawm lub zais zis, thiab cov hlab ntsha ntawm vas deferens ntws mus rau hauv cov tributaries ntawm sab hauv iliac leeg.
YPhysiology of seminal vesicles
Seminal vesicles yog glandularandrogen-dependent organs, lub secretion ntawm uas muaj viscous, dawb-grey jelly-zoo li tshuaj, uas, tom qab ejaculation, ua kua nyob rau hauv ob peb feeb thiab tsim 50-60 feem pua ntawm cov phev. Lub luag haujlwm tseem ceeb ntawm cov hlwv hauv lub cev yog qhov tso tawm ntawm fructose, qib uas qhia txog kev ua haujlwm ntawm androgenic saturation ntawm lub cev.
Seminal vesicles tseem zais lwm yam ntawm cov phev, uas yog:
- tshuaj nitrous;
- inositol;
- proteins;
- ascorbic acid;
- Yprostaglandins.
Seminal vesicle secretion nrog rau cov qe ntshav tso tawm yog kev tiv thaiv colloid, tsim kev tiv thaiv ntau dua rau cov spermatozoa.
