Which organ is responsible for filtering blood in the body?

The kidneys are the organs responsible for filtering blood in the body. They play a crucial role in maintaining homeostasis by regulating the balance of electrolytes, controlling blood pressure, and removing waste products from the bloodstream. Each kidney contains millions of tiny structures called nephrons, which filter blood and create urine by allowing waste products and excess substances to pass while retaining necessary components like water and essential nutrients. This filtration process is vital for the body's overall health and function, as it ensures that toxins and unnecessary substances are efficiently eliminated, maintaining a stable internal environment. This function distinguishes the kidneys from other organs in the body that serve different roles, such as pumping blood, facilitating gas exchange, or processing nutrients.