What is the primary purpose of hemodialysis?

The primary purpose of hemodialysis is to filter waste products from blood. Hemodialysis is a medical procedure used for patients with kidney failure or severe kidney dysfunction. When the kidneys are unable to filter blood effectively due to damage or disease, hemodialysis takes over this crucial role. During the process, blood is drawn out of the body and passed through a dialysis machine, where it is cleaned and filtered to remove toxins, excess salts, and fluids before being returned to the body. This process helps to maintain the body's fluid and electrolyte balance and reduces the buildup of harmful substances in the bloodstream. Therefore, option B accurately describes the essential function of hemodialysis, making it the right choice.