Kwayoyin halitta
Kwayoyin vesicles (wanda kuma ake kira vesicular glands ko glands na seminal) nau'i ne na ƙwayoyin ƙwayoyin cuta na tubular waɗanda ke kwance a bayan fitsari na dabbobi masu shayarwa. Suna fitar da ruwa wanda ya fi yawan samar da maniyyi.
The vesicles are 5–10 centimetres (2.0–3.9 in) in size, 3–5 centimetres (1.2–2.0 in) in diameter, and are located between the bladder and the rectum. They have multiple outpouchings, which contain secretory glands, which join together with the vasa deferentia at the ejaculatory ducts. They receive blood from the vesiculodeferential artery, and drain into the vesiculodeferential veins. The glands are lined with column-shaped and cuboidal cells. The vesicles are present in many groups of mammals, but not marsupials, monotremes or carnivores.[ana buƙatar hujja][<span title="This claim needs references to reliable sources. (November 2025)">citation needed</span>].
Ana kiran kumburi na vesicles na seminal vesiculitis kuma galibi saboda kamuwa da kwayar cuta ne sakamakon kamuwa da cutar ta jima'i ko bin tsarin tiyata. Seminal vesiculitis na iya haifar da ciwo a cikin ƙananan ciki, scrotum, azzakari ko peritoneum, zubar da ciki mai zafi, da jini a cikin maniyyi. Yawancin lokaci ana kula da shi da maganin rigakafi, kodayake yana iya buƙatar zubar da ruwa a lokuta masu rikitarwa. Sauran yanayi na iya shafar vesicles, gami da abubuwan da ba a haifa ba kamar gazawar ko tsari mara cikakke, kuma, ba a saba gani ba, ciwon daji.
Galen ya bayyana vesicles na asali tun farkon karni na biyu AD, kodayake vesicles sun sami sunansu daga baya, kamar yadda aka fara bayyana su ta amfani da kalmar da aka samo kalmar prostate.
Tsarinsa
[gyara sashe | gyara masomin]Kwayoyin ƙwayoyin ƙwayoyin cuta na ɗan adam ƙwayoyin halitta ne maza waɗanda aka sanya su a ƙasa da fitsari kuma a ƙarshen vasa deferentia, inda suka shiga prostate. Kowane vesicle bututu ne mai juyawa da ninkawa, tare da wasu lokutan da ake kira diverticula a bangon sa.[1] Ƙananan ɓangaren bututun ya ƙare a matsayin bututun madaidaiciya da ake kira bututun fitarwa, wanda ya haɗu da vas deferens na wannan gefen jiki don samar da bututun ejaculatory. Hanyoyin zubar suna wucewa ta cikin glandar prostate kafin su buɗe daban a cikin verumontanum na urethra na prostatic.[1] Vesicles suna tsakanin 5-10 in) a girman, 3-5 in) a diamita, kuma suna da ƙarar kusan 13 mL.[2]
Vesicles suna karɓar jini daga jijiyar vesiculodeferential, da kuma daga ƙananan jijiyoyin vesical. Kwayar jijiyar vesiculodeferential ta samo asali ne daga jijiyoyin umbilical, wanda ke da reshe kai tsaye daga jijiyoyin iliac na ciki. Ana zubar da jini a cikin jijiyoyin vesiculodeferential da ƙananan plexus, wanda ke shiga cikin jijiyoyin iliac na ciki.[1] Rashin ruwa na lymphatic yana faruwa ne tare da hanyoyin jijiyoyi, yana gudana cikin Ƙwayoyin iliac na ciki.[1]
Vesicles suna kwance a bayan kumfa a ƙarshen vasa deferentia. Suna kwance a cikin sarari tsakanin kumfa da rectum; kumfa da prostate suna kwance a gaba, ƙarshen ureter yayin da yake shiga kumfa a sama, da fascia na Denonvilliers da rectuma a baya.
Ci gaba
[gyara sashe | gyara masomin]A cikin tayin mai tasowa, a ƙarshen baya akwai cloaca. Wannan, a cikin mako na huɗu zuwa na bakwai, ya kasu kashi ɗaya cikin sinus na urogenital da farkon tashar hanci, tare da bango da ke tsakanin waɗannan inpouchings guda biyu da ake kira Urectal septum . Ducts guda biyu suna samuwa kusa da juna waɗanda ke haɗawa da sinus na urogenital; duct na mesonephric da duct na paramesonephric, waɗanda ke ci gaba da samar da hanyoyin haihuwa na namiji da mace bi da bi.[2]
A cikin namiji, a ƙarƙashin tasirin testosterone, bututun mesonephric suna ƙaruwa, suna samar da epididymis, ductus deferens kuma, ta hanyar karamin outpouching kusa da ci gaban prostate, vesicles. Kwayoyin Sertoli suna fitar da hormone na anti-Müllerian, wanda ke haifar da hanyoyin paramesonephric su koma baya.[2]
Ci gaba da kiyayewa na vesicles na asali, kazalika da ɓoyewa da girman / nauyi, sun dogara sosai da androgens.[3] Kwayoyin ƙwayoyin ƙwayoyin cuta suna ƙunshe da 5α-reductase, wanda ke haɓaka testosterone a cikin ƙarfinsa, dihydrotestosterone (DHT). [3] An kuma gano vesicles na asali suna dauke da masu karɓar hormone na luteinizing, sabili da haka ana iya sarrafa su ta hanyar ligand na wannan mai karɓa, luteinized hormone.[3]
- 1 2 Cite error: Invalid
<ref>tag; no text was provided for refs named "Grays2016". - 1 2 Cite error: Invalid
<ref>tag; no text was provided for refs named "Langman2019". - 1 2 3 Gonzales GF (2001). "Function of seminal vesicles and their role on male fertility". Asian J. Androl. 3 (4): 251–8. PMID 11753468.
