Sperm Route and Seminal Vesicles

00:01 Now, let's look at that in a bit more detail and look at the root of the sperm from the testes all the way through to the base of the bladder in the seminal vesicles.

00:11 So here we can see now we've got the testi and then posterior and superiorly, we've got the epididymis.

00:16 We can see the running behind it, we have the ductus deferens.

00:20 So now we have sperm passing from the testes via ductus deferens.

00:26 Running alongside the deck ductus deferens and has been taken as a continuation of the testes from the abdomen down into the scrotal sac.

00:33 We have the testicular artery.

00:35 We also have a venous plexus.

00:37 So venous drainage from the testes here, and we'll have various nerves that are passing down into the testes.

00:44 And these are all going to be bound up within the spermatic cord.

00:48 So here we have the testicular artery, veins, and nerves passing from the abdominopelvic cavity via the spermatic cord to innovate and supply the testi.

01:00 Now, if we introduce the organs, other organs of reproduction.

01:03 We can see the penis here.

01:05 In the top right, we can see the prostate.

01:07 We can now look at how the relationship of the ductus deferens passes through these structures.

01:13 So we can pick up the ductus deferens.

01:15 It's lying anterior to the pubic symphysis as it runs into the superficial inguinal ring and enters the inguinal canal.

01:23 We can see as it leaves the middle canal via the deep inguinal ring.

01:26 We can see we have the venous plexus, the nerve, and the artery entering into the deep to run down through the cord.

01:34 But the doctors deferens takes a different route.

01:37 It migrates towards the midline where it then runs over the superior surface of the bladder.

01:42 So, then run over the base where it becomes associated with the seminal vesicle.

01:47 So, here if we now have a look at a posterior view of the bladder.

01:51 We can see the ductus deferens coming in laterally.

01:54 So, we've got the bladder here.

01:56 We can see the ductus deferens is coming in laterally on either side.

01:59 We can also see the close association with the ureter as well.

02:03 So, ureter most laterally coming down from the kidney.

02:07 We've got the ductus deferens then running in close position next to the ureter, and it dilates superiorly to the seminal vesicle or seminal gland, which we can see here.

02:18 So, either side of the midline, we have the ductus deferens.

02:21 It's ampulla, where it's dilated, is running alongside the seminal.

02:25 Here we can see both of the seminal vesicles and the slightly kind of postural lateral view.

02:31 But we can see the ductus of the seminal visicle, which is where it's giving rise to the seminal fluid or the semen that then passes alongside the ductus deferens to form the ejaculatory duct.

02:44 So, the ductus deferens is coming down.

02:46 It's met by the ductus of the seminal vesicle.

02:49 The combination of those two tubes, forms the ejaculatory duct.

02:53 Remember, will have to ejaculatory ducts.

02:56 The left ductus deferens and the left seminal vesicle forming the left one.

03:01 The right ductus deferens, the right seminal vesicle, forming the right ejaculatory duct.

03:06 So, left and right passing down into the urethra.