That women’s urethras are independent from their reproductive system and man’s urethra is connected with a duct of reproductive system which carries urine.

Nephrons are structural and functional units of the kidneys.They are tubes with one closed end and are surrounded by blood capilaries. 

The respiratory system removes CO2 from blood and releases it to the exterior.

Carbon dioxide,urea,uric acid,and toxic substances.

Respiratory system,sweat glands,liver and urinary system.

The sweat glands releases certain waste products to the exterior through sweat.

To facilitate the elimination of waste products produced by cells after cell metabolism.

The liver eliminates products resulting from the destruction of haemoglobin found in old red blood cells. 

The urinary system eliminates waste products through the urine.

Renal cortex,renal medulla and renal pelvis.

Bladder:it accumulates urine.

The urinary system is formed by two organs:the kidneys,and two types of urinary tracts:the ureters and urethra.

Ureters:they transport urine from each kidney to the bladder.