The route of urine excretion from kidney to outside of body is:
Correct answer: A. Kidney → ureter → urinary bladder → urethra
- A. Kidney → ureter → urinary bladder → urethra
- B. Urinary bladder → kidney → ureter → urethra
- C. Kidney → urethra → urinary bladder → ureter
- D. Kidney → ureter → urethra → urinary bladder
Explanation
Option A describes the correct route of urine excretion. The kidney filters blood and forms urine. This urine is to be excreted out of the body, and from the kidney, it drains into the ureter. Each kidney drains into one ureter, which is a long muscular tube, that leads into the urinary bladder, which is a sac-like organ that collects urine from the kidney. When a certain amount of urine has been collected, it is urinated out by a thin tube known as the urethra.All of the remaining options describe jumbled up/incorrect routes of urine excretion.
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About Homeostasis
Homeostasis maintains a stable internal environment through the kidney and urinary system, thermoregulation and excretion. The kidney topics include filtration, selective reabsorption, urine formation and water balance, while thermoregulation involves sweating, vasodilation, vasoconstriction and hormonal control; excretion is different from egestion, which removes undigested food.
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