Kalmar "coelom" tana nufin wani rami na jiki a cikin mesoderm na yawancin dabbobi, ciki har da mutane. Wannan kogon yana lullube da wani membrane mai suna peritoneum kuma yana dauke da gabobin ciki. Kalmar “coelom” ta fito daga kalmar Helenanci “koiloma,” wanda ke nufin “rami.”
