What are the main structures of the urinary system? what is the function of each of these structures hbs?

The main structures of the urinary system are

kidneys - kidneys filter blood and ejects waste material like urea and excess water

ureteres - two tubes that transport waste in form of urine from the kidney to the bladder

bladder-stores urine until the right time to get rid of it

urethra - tube that transports urine from the bladder to outside the body