Apparatus for separating tissue cells from a fluid

Apparatus for separating tissue cells from a fluid, with a collection container forming a collection space, the collection container (14) has a closable removal opening (27) for the collected tissue cells, the collection container (14) is closable with a lid (15) which has an opening (31) for connecting a negative pressure source, a connecting element (24) for connecting a supply line for the fluid-tissue cell mixture (23) and the closable removal opening (27), wherein inside the collection space (18) a communicating tube (16) is arranged, which terminates at a distance from the bottom (17) of the collection container (14), wherein the communicating tube (16) has at least one opening (21) providing a connection between the interior space of the communicating tube (16) and the collection space (18) above a fluid-tissue cell mixture level (22) established in the collection container (14), and wherein a suction element (20) which is connected with the negative pressure source (6) is arranged inside the communicating tube (16).