Please describe the pathway involved for formation and excretion of urine.
  1. Nephrons in the kidneys filter blood, draining the waste products into the floor of the kidney, ureters drain the urine from the kidneys into the bladder, and the urethra drains the bladder, passing urine outside of the body.
  2. Nephrons in the kidneys filter blood, draining the waste products into the floor of the kidney, the urethra drain the urine from the kidneys into the bladder, and the ureters drain the bladder passing urine outside of the body.
  3. The bladder produces urine from the ureters; the urethra drains the bladder of urine to outside the body.
Explanation
Answer: A - Urine begins its formation as the nephrons filter and remove waste from the blood stream.The urine is drained from the kidney via the ureters to the bladder, a urineholding tank. When the bladder becomes full enough, nerves signal the need to urinate, the urethra is the tube that connects the bladder to the outside of the body,and voilà, urination!
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