membranous urethra
The urogenital papilla is part of the urogenital system, specifically in females where it forms the external opening of the urogenital sinus. It is located near the cloaca and plays a role in excretion and reproduction.
The narrowest part of the male urethra is the external urethral meatus, which is the opening at the tip of the penis where urine and semen exit the body. It is the most constricted part of the urethra and can be prone to blockages or infections.
Semen is ejaculated from the urethra, which is the tube that runs through the penis. It carries both urine and semen, but they are not expelled at the same time. The muscles in the urethra help control which substance is being released.
The organs of the excretory system include the kidneys, ureters, bladder, and urethra. The kidneys filter waste products from the blood to form urine, which is then carried to the bladder through the ureters for storage until it is expelled from the body through the urethra.
Genitourinary or urogenital system
The three regions/sections of the male urethra are:Prostatic UrethraThe prostatic urethra begins at the neck of the bladder and includes all of the section that passes through the prostrate gland. It is the widest and most dilatable part of the male urethral canal.Membranous UrethraThe membranous urethra is the shortest and narrowest part of the male urethra. This section measures approx. 0.5 - 0.75 inches (12 - 19 mm) in length and is the section of the urethra that passes through the male urogenital diaphragm.The external urethral sphincter (muscle) is located in the urogenital diaphragm (as for the female urethra). This muscle is referred to as the "compressor urethrae muscle" in some older textbooks.The passage of urine along the urethra through the urogenital diaphragm is controlled by the external urethral sphincter, which is a circular muscle under voluntary control (that is, it is innervated by the somatic nervous system, SNS).See the page about micturation for more about control of these structures by the nervous system.Spongy UrethraThe spongy urethra is the longest of the three sections. It is approx. 6 inches (150 mm) in length and is contained in the corpus spongiosum that extends from the end of the membranous portion, passes through the penis, and terminates at theexternal orifice of the urethra - which is the point at which the urine leaves the body.
The male urethra is divided into threesegments.The prostatic urethra passes through the prostate gland, the urogenital diaphragm and the bulb of the urethra.The membranous urethra has the shortest length and is found between the prostatic urethra and the spongy urethra. It extends downward between the apex of the prostate and the bulb of the urethra.The spongy urethra is the longest part of the male urethra and it passes through the length of the penis, more specifically through the corpus spongiosum penis (a mass of spongy tissue surrounding the male urethra within the penis), and the glans.
The ejaculatory duct opens into the prostatic part of the urethra, specifically where the prostatic urethra meets with the membranous urethra. This junction is located within the prostate gland.
The urogenital papilla is part of the urogenital system, specifically in females where it forms the external opening of the urogenital sinus. It is located near the cloaca and plays a role in excretion and reproduction.
Wiki: "In anatomy, the genitourinary system or urogenital system is the organ system of the reproductive organs and the urinary system. These are grouped together because of their proximity to each other, their common embryological origin and the use of common pathways, like the male urethra."Womens system isn't linked like that. We have one urethra with no connection to the reproductive system.
the urethra
Urethra is not a part of nephron. You have about one million nephrons in each kidney and you have only one urethra.
The narrowest part of the male urethra is the external urethral meatus, which is the opening at the tip of the penis where urine and semen exit the body. It is the most constricted part of the urethra and can be prone to blockages or infections.
The male urethra.Urethra.The urethra is the common passageway for urine and semen in males (only).The impulse to expel waste or reproduce.urethraThe penis is the organ that discharges both urine and semen, at least in a male.Semen joins the male urethra in the part that runs through the prostate, the prostatic urethra. From here it shares its pathway with urine, through intermediate urethra then the spongey urethra. The ony part that the urine has entirely to itself is the intramual part that runs through the bladder wall.The urethra.The urethra transports both semen and urine in males.The penis is the organ and there is tube within the penis called URETHRA where sperm and urine discharge
Urethra has three regions in males, the prostatic urethra, membranous urethra, and the spongy urethra.
The Diaphragm is part of the respiratory system.
The rectum is part of the digestive system. Both are part of the excretory system. The urethra is part of the urinary system.