Hemodialysis uses a special filter called a dialyzer that functions as an artificial kidney to clean your blood. The dialyzer is a canister connected to the hemodialysis machine.
seat noun (FURNITURE) A2 [ C ] a piece of furniture or part of a train, plane, etc. that has been designed for someone to sit on: Chairs, sofas and benches are different types of seat. Please have/take a seat (= sit down). A car usually has a driver's seat, a front/passenger seat and back/rear seats.
residence, abode, established place, late 13c., extended use of seat (n.1), influenced by Old French siege seat, established place, and Latin sedes seat. Meaning city in which a government sits is attested from c.1400. Sense of right of taking a place in a parliament or other legislative body is attested from 1774.