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Sperm Route and Seminal Vesicle – Male Reproductive Organs

by James Pickering, PhD
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    00:01 So we have now got the sperm running through the ductus deferens.

    00:06 They runs through the ductus deferens. They enter the inguinal canal via the superficial inguinal ring.

    00:11 They then run along the inguinal canal to enter the pelvis via the deep inguinal ring.

    00:16 And we can pick them up running alongside the bladder.

    00:20 So here the posterior view of the bladder. We have got the posterior view of the bladder. We can just see the apex at the top going to the anterior abdominal wall.

    00:31 And running down we have got the ureters coming from the two kidneys we have got the uterus running down And sweeping around the bladder we can find we have got our ductus deferens.

    00:41 Notice how they run over the bladder or the bladder runs under the ductus deferens we can see them here.

    00:48 Obviously we have two testes one on either side in the scrotum so we have two ductus deferens.

    00:56 As the run along the posterior surface of the bladder they become dilated and that's what we call the ampulla of the ductus deferens.

    01:05 And here, the ampulla of the ductus deferens runs alongside at an important gland and this gland is known as the seminal vesicle or the seminal gland.

    01:16 And the seminal vesicle, the seminal glands produce the semen produce the environment that is helpful, that is friendly for the sperm to survive in, prior to ejaculation and then [inaudible 0:23:51.880] them in the vaginal vault, hopefully passing through the cervix for reproduction to occur.

    01:37 So we have the seminal glands here. If we look at this diagram on the opposite side we can see that we have the prostatic part of the urethra indicated here in yellow. So that's the prostatic part of the urethra.

    01:52 And that's going to carry on extending all the way down towards the membranous part of the urethra here.

    01:59 And what we can see is that we have got our prostrate. The urethra passing through the prostrate and we can see this seminal vesicle and we can see our vas deferens.

    02:11 And the opening for the seminal vesicle combines with the vas deferens to form an ejaculatory duct.

    02:19 This ejaculatory duct crosses through the substance of the prostate to open up into the prostatic urethra.

    02:29 So here we have got the prostatic urethra and we can see that the ejaculatory duct is opening up into it.

    02:36 This is how the semen can then be expelled from the body by passing into urethra that runs through the penis.

    02:45 So we have got the ureters entering into the bladder which we can see here.

    02:50 The important point is the relationship the ureters have to the ductus deferens and ureters run underneath the ductus deferens or the vas deferens.

    03:00 The ductus deferens occur at the start of the epididymis so where you have the tail of the epididymis then the ductus deferens continue.

    03:08 The ductus deferens they enters the pelvis by crossing the iliac vessels and they run over the ureters.

    03:16 As they approach the seminal vesicles they dilate and form the ampulla.

    03:23 The ampulla then combines with the seminal vesicles to form the ejaculatory duct.

    03:30 The seminal vesicles are important in secreting this thick alkaline fluid.

    03:35 This is important because the environment of the vagina is quite acidic and the alkaline help to neutralize that environment.

    03:45 The ejaculatory ducts are then the slender tubes that pass through the substance of the prostate and they open on the seminal colliculus.

    03:54 This is an elevation of the prostatic urethra.


    About the Lecture

    The lecture Sperm Route and Seminal Vesicle – Male Reproductive Organs by James Pickering, PhD is from the course Pelvis.


    Included Quiz Questions

    1. Epididymis-ductus deferens-ejaculatory duct-penis
    2. Penis-ejaculatory duct-ductus deferens-epididymis
    3. Ejaculatory duct-ductus deferens-epididymis-penis
    4. Ductus deferens-epididymis-ejaculatory duct-penis
    5. Epididymis-ejaculatory duct-ductus deferens-penis
    1. Epididymis
    2. Interstitial cells of the testes
    3. Seminiferous tubules
    4. Rete testes
    5. Seminal vesicle

    Author of lecture Sperm Route and Seminal Vesicle – Male Reproductive Organs

     James Pickering, PhD

    James Pickering, PhD


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