Correct Option
The correct option isPassage of urine from the bladder to the exterior
Explanation
The human excretory system is composed of a pair of kidneys, a pair of ureters, a urinary bladder, and a urethra. Each organ performs a distinct function in the process of urine formation, transport, storage, and elimination (micturition).
Option Analysis
- Filtration of blood to produce urine is incorrect: The filtration of blood to produce urine occurs in the kidneys. Specifically, this process takes place in the nephrons, which are the functional units of the kidney.
- Transport of urine from the kidneys to the urinary bladder is incorrect: The transport of urine from the kidneys to the urinary bladder is the function of the ureters. These are muscular tubes that propel urine via peristalsis.
- Storage of urine prior to excretion is incorrect: The storage of urine prior to excretion is the primary function of the urinary bladder. It is a muscular sac that expands to hold urine until the urge to micturate arises.
- Passage of urine from the bladder to the exterior is correct: The urethra is a tube that extends from the neck of the urinary bladder to the exterior. Its primary function is to conduct urine from the bladder to the outside of the body during micturition. In males, it also serves as a passage for semen.
Key Takeaway: The urethra is the terminal duct of the urinary system, responsible for the final expulsion of urine from the urinary bladder to the external environment.