In a typical healthy adult, how many kidneys are present?

A One

B Three

C Two

D Four

Solution

Correct Answer: Option C

- In a typical healthy adult, there are two kidneys.
- These organs play a crucial role in filtering waste products from the blood, regulating fluid and electrolyte balance, and maintaining overall homeostasis.
- Each kidney is located on either side of the spine, just below the rib cage.
- The presence of two kidneys provides a form of redundancy, allowing for normal kidney function even if one is damaged or removed.

Key points to remember:
- Two kidneys are the normal anatomical standard in healthy adults.
- They are vital for filtration of blood and production of urine.
- Kidneys regulate fluid balance, electrolytes, and blood pressure.
- Having two kidneys provides an important backup in case of injury or disease.

Reference: Guyton and Hall Textbook of Medical Physiology, 14th Edition, Chapter 26: The Urinary System and Body Fluids

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