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On the latter there is a median sulcus (groove), from which a thin fibrous septum (wall) projects into the substance of the bulb and divides it imperfectly into two lateral lobes or hemispheres. The portion of the corpus spongiosum in front of the bulb lies in a groove on the under surface of the conjoined corpora cavernosa penis.
The urethra (pl.: urethras or urethrae) is the tube that connects the urinary bladder to the urinary meatus, [1] [2] through which placental mammals urinate and ejaculate. [3] In non-mammalian vertebrates , the urethra also transports semen but is separate from the urinary tract.
Dissection of prostate showing the fibers of the external sphincter surrounding the membranous urethra and partially cradling the inferior portion of the prostate. The urethral sphincters are two muscles used to control the exit of urine in the urinary bladder through the urethra .
In male anatomy, the lacuna magna (also called Guérin's sinus) is the largest of several recesses in the roof of the navicular fossa of the male urethra. Structure [ edit ]
The urinary meatus [a] (/ m iː ˈ eɪ t ə s /, mee-AY-təs; pl.: meati or meatuses), also known as the external urethral orifice, is the opening of the penis or vulva where urine exits the urethra during urination. It is also where semen exits during male ejaculation, and other fluids during female ejaculation. The meatus has varying degrees ...
The urorectal septum is an embryonic structure formed from an invagination of the cloaca. The urorectal septum divides the cloaca into two parts: a dorsal part, forming part of the hindgut, which forms the rectum and the anus. [1] a ventral part, forming the urogenital sinus, which forms the allantois, which becomes the urinary bladder. [1]
[2] [1] This septum is composed of multiple strands of connective tissue , similar to that of the tunica albuginea . [ 3 ] It is thick and complete behind, where the corpora cavernosa become independent and form separate crura , [ 3 ] but it is imperfect in the front, where it consists of a series of vertical bands arranged like the teeth of a ...
The urethral crest is an anatomical feature present in the urinary system of both males and females.. In males, the urethral crest is known as the crista urethralis masculinae, or the crista phallica, and is a longitudinal fold on the posterior wall of the urethra extending from the uvula of the bladder through the prostatic urethra. [1]