Correct Option
The correct option is (c).
Explanation
The human excretory system is responsible for the elimination of nitrogenous wastes from the body. It consists of a pair of kidneys, a pair of ureters, a urinary bladder, and a urethra. Urine formed in the kidneys follows a specific unidirectional path through these organs for storage and eventual excretion.
Statement-wise Analysis
- Statement 1 is Incorrect. The urethra is the final canal through which urine passes from the urinary bladder to the exterior of the body. Urine flows from the urinary bladder into the urethra, not the other way around.
- Statement 2 is Correct. The ureters are slender tubes that extend from the renal pelvis of each kidney. Their primary function is to transport urine produced in the kidneys down to the urinary bladder.
- Statement 3 is Correct. The urinary bladder is a hollow, muscular organ situated in the pelvic cavity. It serves as a temporary reservoir for urine. Urine is stored here until the central nervous system signals the voluntary contraction of the bladder muscles to release urine through the urethra (micturition).
Key Takeaway
The correct anatomical sequence of urine flow in the human body is: Kidneys → Ureters → Urinary Bladder → Urethra.