II.  Internal Anatomy

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     A.Gills - Extracts oxygen from water and eliminates gaseous waste. 
     B.Stomach - Cardiac and Pyloric - secretes hydrochloric acid.
     C.Intestine - Food Broken down by enzymes, last part of digestive tract.
          1.Pyloric Ceca - first part of intestine, seems to extend surface area.
     D.Liver - Secretes bile which emulsifies fat
     E.Kidney - Filters blood - behind gill.
     F.Heart - Under gill, pumps blood
     G.Swim Bladder - filled with air; Maintains buoyancy.
     H.Spleen-forms and stores blood.
     I.Vent-Waste materials exit here.
(Also called Urogenital opening)