Final answer:
Hemodialysis is the dialysis method performed outside of the patient's body, using an artificial kidney machine to remove waste from the blood.
Step-by-step explanation:
The type of dialysis that occurs outside of the patient's body is A) Hemodialysis. Hemodialysis is a medical procedure where a patient's blood is filtered using an artificial kidney machine, or a dialysis machine. In this machine, the blood flows through cellophane tubes placed in a solution called dialysate, which assists in removing waste products such as urea as well as excess water. The semipermeable cellophane tubing allows waste molecules to pass through into the dialysate while red and white blood cells remain in the blood, as they are too large to pass through the membrane. After the blood is purified, it is returned to the patient's body. This process is a critical life-saving treatment for patients with kidney failure and is often a prelude to kidney transplantation for eligible patients.