Apheresis

Apheresis (ἀφαίρεσις (aphairesis, "a taking away")) is a medical technology in which the blood of a person is passed through an apparatus that separates out one particular constituent and returns the remainder to the circulation. It is thus an extracorporeal therapy.

For the linguistic term, see Apheresis (linguistics).
"Pheresis" redirects here. Not to be confused with Phoresis.
Apheresis
Whole blood enters the centrifuge (1) and separates into plasma (2), leukocytes (3), and erythrocytes (4). Selected components are then drawn off (5).
MeSHD016238

One of the uses of apheresis is for collecting stem cells.

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