Intravenous administration of a hypotonic solution or plain distilled water will also destroy red blood cells by causing them to fill with fluid until their membranes rupture. In a transfusion reaction or in erythroblastosis fetalis, incompatibility causes the red blood cells to clump together. The agglutinated cells become trapped in the smaller vessels and eventually disintegrate, releasing hemoglobin into the plasma.
For the skate brand of the same name, see Roller Derby (brand). Roller derby is a contact sport played by two teams of five members roller skating in the same direction around a track. Game play consists of a series of short match ups (jams) in which both teams designate a jammer who scores points by lapping members of the opposing team.
Roller derby is a fast-paced, full-contact sport played by two teams on quad roller skates, skating around an oval track. Teams of five skaters play in each two minute âjamâ â each team consists of a âjammerâ and four âblockersâ. The jammers are the point scorers and race against each other through the pack and around the track. The blockers do all they can to help their jammer through and stop the other teamâs jammer.