described urethra in details add point structure and function on it...marks-12 needed long and details answer,,, don't give short or useless answer otherwise i will report☺
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urethra....
❄It is the part of the excretory system in all the living organisms..
❄It is a duct through which the urine from the bladder is travelled out ofthebody.
❄It is the last segment of urinal tack
❄In females,it only have excretory purpose.
❄But in males it is the common path for both urine and sperm.
❄There is size difference in male an female urethra.
❄Length of female urethra is 4 -5 cm which is small while males have 15 -20 cm.
❄In male the seminal fluid is also expelled through the urethra during ejaculation.
❄Once the bladder become full urine flows through urethra and leaves the body at urethral meatus which is located at the top of penis.
❄In female urethra is a part of renal system
❄The kidneys, ureters an bladder are also part of this system .
❄The renal system is responsible for producing, storing and eleminating liquid waste in the form of urine.
❄ Female urethra begin at the bottom of the bladder.
❄ It extends downwardly through the muscular area of pelvic floor.
❄ Before reaching urethral opening urine passes through urethral sphincter.
❄ The pathway of urine starting from the organ of its formation is like this...
KIDNEY ➡ URETERS ➡ URINARY BLADDER ➡ URETHRA.
☀ the organs involved in excretion are as follows...
BOWMAN'S CAPSULE and GLOMERULUS
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FILTER THE BLOOD PASSING THROUGH THEM
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TUBULAR PART OF NEPHRON
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REABSORB PARTICLES LIKE GLUCOSE,AMINO ACIDS,SALTS AND WATER
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COLLECTING DUCT
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COLLECT URINE FROM NEPHRON AND JOIN THE URETER
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URETERS
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COLLECT URINE FROM KIDNEY AND PASS IT ON TO URINARY BLADDER
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URINARY BLADDER
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STORE URINE UNTIL THE PRESSURE OF EXPANDED BLADDER LEADS TO URGE TO PASS URINE
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EXCRETE OUT URINE FROM THE BODY.
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