What statements accurately describe dialysis?

Dialysis is a medical treatment specifically designed to replicate some functions of the kidneys, particularly in cases of renal failure. It is primarily used to remove waste products, excess fluids, and electrolytes from the blood when the kidneys are no longer able to perform these functions effectively. This makes it an essential treatment for patients with kidney failure, allowing them to maintain a better quality of life.

The other statements do not accurately describe dialysis. For instance, dialysis does not solely remove blood; it primarily processes the blood to remove toxins and excess substances, including liquid. Additionally, patients with functioning kidneys do not require dialysis since their kidneys are capable of filtering waste and excess fluid on their own. Lastly, dialysis machines do not enhance digestion; they serve to clean the blood and support kidney function, not digestive processes.