Yes, but only partially; salts can be released also by transpiration.
Yes. Urine is comprised of waste products, including salts your body does not need.
One material that leaves the body in urine is protein.
The urethra
Urine travels through the urethra to leave the body. The urethra connects the bladder to the exterior of the body.
it leaves your body through the urethra
it exits with urine
they leave through sweat
Salts are released from the body in water solution, by transpiration.
Mostly by urine and feces.
Urine leaves the body through the urethra. The urethra connects the bladder to the outside of the body.
urethra
Sperm leave the body through the urethra. The same place that urine also leaves the body.