Transcript for:
Female External Genitalia Overview

in this video I'm going to highlight some of the structures that I've sketched in here for the female the female reproductive Anatomy and for this video I'm going to focus first on the external genitalia the external genitalia now much like the male anatomy there's a primary organ of reproduction and then there's secondary organs and it's all about that primary organ so I want you to think about what the homolog or the equivalent structure of the testes the primary organ of reproduction in the male is for the female what's the counterpart in the female well the counterpart is going to be the over and the ovary is this structure here now that's part of the internal reproductive anatomy for the female and in this video I'm going to be concerned with the external genitalia but whether it's the internal anatomy or the external anatomy all of the structures I'm going to go over our accessory the only organ and it's kind of hidden behind this uterus here that's required especially in this day and age for reproduction is that ovary because that ovary has the gammy from the female that's the egg or the ovum so let's get oriented a little bit here I have part of the sacrum with the sacral hiatus the coccyx the rest of the sacrum and some trabecular bone here at its core so this is the posterior aspect and we have some ligaments supraspinous ligament coming all the way down and actually and anchoring the sacrum here to the urogenital diaphragm this is the urogenital diaphragm that reaches the pubic symphysis anteriorly which has its own connective tissue that connects to the aponeurosis of the anterior abdominal wall or the Linea Alba okay now coming through that sacral canal we would have the spinal cord an important reading here with cauda equina the connective tissue the filum terminale e and green it down okay to the sacrum here we have some trabecular bone and that's pubic well I guess it would be blue if it was actually the pubic symphysis with its cartilage here's the skin on the anterior aspect and the skin of the thigh skin the buttocks and the hamstring now this skin has a particularly great amount of adipose underlying it at this structure called the Mons pubis this is got an especially extensive hypodermis it helps insulate and protect provided cushion for the all-important external genitalia for the female reproductive tract okay here we see this larger fold of skin called the labia majora the labia majora the homolog in the male of the labia majora is the scrotum if this were to go downwards bilaterally and fuse it a midline Rafi we would have the scrotum of the male but that's not what happens because females don't produce enough testosterone to begin that transition into a male now deeper in this region that we call the vestibule is the labia minora and the homolog of the labia minora is the ventral penis so you can kind of think on the ventral side of the peanut penises corp or spongy oh so that erectile body that helps keep the urethra with its external urethral orifice that opens into this vestibule patent or open so you can imagine if the majority rule word and the menorah grew downward infused along the midline with the other and the urethra extended as that grew more and more we would develop the ventral penis with the urethra inside now on its posterior aspect the penis has the main erectile body for the male the purported cavernosum and for the female this is the clitoris this is the whole log of that corpora cavernosa or the main erectile body it's also the main erectile body for the female and it opens into this vestibule now posterior to that Mons pubis the pubic symphysis and the clitoris is that urinary bladder with its urethra and external urethral orifice this would be the internal urethral orifice moving even more posterior in the vestibule is the vaginal canal and here we see the open of that vaginal canal now notice how the vaginal canal epithelium is a little bit serrated form follows function and this is 2a excite or to create friction against the male's copulatory organ the penis so this is the females main copulatory organ as well this is the vaginal canal and here's the wall of the vagina moving upwards and leading toward the uterus okay moving even more posterior we have the bolt of the vestibule and I bet people could take a guess at what the whole longest structure in the mail for the bulb of the vestibule that opens into the vestibule and secretes lubricating fluid into that vestibule now this is the equivalent of the bulb of your wreath role and which is at the root of the penis in the mail but in the female opens right here into the vestibule so we have many of these greater vestibular glands that open into the vestibule so the openings into the vestibule include most anterior the urethra in the middle the vaginal canal and throughout the best of you'll the greater vestibular glands now most posterior in this area that runs from the coccyx to the pubic symphysis anterior and posterior and then the ischial tuberosities laterally also known as this diamond shape perineum is the anal canal the anal canal most posterior and I thought anal canal we see glands we see some glands we also have these glands kind of surrounding the urethra and the vaginal canal as they pass through this muscular structure of the urogenital diaphragm take more little commands here arteries veins of the anal canal are there as well so some arteries veins similarly over over in this area okay so let me go through and label some of these we saw that anal canal that leads to the rectum most posterior in that perineum we see the greater vestibular gland or the bulb of the vestibule greater vestibular glands flash ball of the vestibule okay I would say that there is a difference between these the greater vestibular glands are more like the penile glands okay they're gonna be deep to that labia minora and we know that those penile glands dump into the urethra to lubricate and neutralize acids the greater the bulb of the best of you'll is more like the bullet you're either gland both are very similar in function though so these guys are going to be all throughout opening into deep deep to that labia minora whereas the bulb of the vestibule is here now this was the labia minora labia majora clitoris Mons pubis and of course we have the vaginal canal and the urethra the vaginal canal now the only one we didn't talk really about a homolog for that's not readily apparent is the vaginal canal males lack the vaginal canal of the uterus and this tubular structure altogether that's the main difference between the female reproductive and the male reproductive and their whole looks or homologous structures homologous structure is a counterpart or similar structure in a different sex in this case