Collar cells

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Collar cells are a flagellated cells that pump water into a sponge.[1] [2]


  1. Sponges feed by filtering small food particles (some even eat bacteria) out of water pumped through the system by flagellated collar cells. (See Sponges: Animals without Backbones)
  2. Wile, Dr. Jay L. Exploring Creation With Biology. Apologia Educational Ministries, Inc. 1998