The membranes of dialysis machine are semi permeable membrane.
Step-by-step explanation:
Dailysis is the process of artificial separation of blood from the waste products and excretory substances. This process uses the process of osmotic separation of the blood from the excretory substances by using a fluid which also contains the materials of blood but in small amounts to prepare a osmotic gradient through which when the blood passes, can filter it off. The membrane separating the blood from the fluid is a semi permeable membrane which allows the water to go out along with urea and other excretory products slowly as the blood passes through Dyalysis machine.