Nephrology: Kidney Health Explained

The kidneys are two bean-shaped organs located on either side of the spine, just below the ribcage. Despite their small size, each roughly the size of a fist, they play a vital role in maintaining overall health. As part of the urinary system, the kidneys filter waste, balance bodily fluids, regulate blood pressure, and contribute to red blood cell production. Understanding how the kidneys function is crucial for appreciating their importance and recognizing potential health concerns.

Each kidney contains about a million tiny filtering units called nephrons. These nephrons work tirelessly to remove waste products and excess fluids from the blood, which are then excreted as urine. The kidneys also help maintain the body’s electrolyte balance by regulating levels of sodium, potassium, and calcium. This precise balance is essential for proper nerve and muscle function. Additionally, the kidneys produce hormones such as erythropoietin, which stimulates red blood cell production in the bone marrow, and renin, which helps regulate blood pressure. Without the kidneys' ability to perform these tasks, the body would struggle to maintain equilibrium, leading to serious health complications.

One of the kidneys' primary functions is detoxification. Every day, they filter around 50 gallons of blood, removing harmful substances such as urea, creatinine, and toxins that accumulate from food, medications, and metabolic processes. This filtration process ensures that waste products do not build up to dangerous levels in the bloodstream. When kidney function declines, these substances can accumulate, leading to symptoms like fatigue, swelling, and confusion.

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Hörbuch: 6. März 2025