&part1=Skull
&part1_description=Complex bony or cartilaginous protective skeleton of the head and support for moving parts such as the jaws and gill flaps.

&part2=Brain
&part2_description=The centralized part of the nervous system that includes all higher nervous centers.  Enclosed within the skull and continuous with the spinal cord.

&part4=Kidney
&part4_description=Paired excretory organ that filters wastes (urea) from blood.  Excretes waste and water as urine, and regulates osmotic concentration.  Variable structure and function.  


&part5=Vertebral Column
&part5_description=Backbone consisting of multiple vertebrae through which the spinal never cord runs.  Structural support for blocks of muscle (myotomes).

&part6=Myotomes
&part6_description=Blocks of body muscle that "flake" when cooked.  Two myotomes per vertebrae in some fishes.  Each myotome divided into four parts you see in a fish "steak".


&part8=Testes
&part8_description=Paired male reproductive glands.


&part9=Gas Bladder
&part9_description=Gas-filled structure used to control buoyancy, produce or receive sound, and respiration.  Derived from digestive system or lung. May be absent.

&part10=Intestine
&part10_description=Elongate tubular canal, past the stomach and pyloric caeca.  Functions in digestion and elimination.  Shorter in  carnivores than herbivores.

&part11=Pyloric Caeca
&part11_description=Finger-like sacs attached to the anterior (headward) side of the intestines. Likely involved in digestion and absorption. Can be absent or numerous.

&part12=Spleen
&part12_description=Structure involved in blood-cell formation.

&part13=Stomach
&part13_description=Opening between the anus and the anal fin where the fish will excrete either eggs or sperm.  Located posterior (tailward) of the anus. 

&part14=Liver
&part14_description=Large usually bilobed gland that secretes bile and stores glycogen, among other functions.  Bile is used to digest fats.

&part15=Heart
&part15_description=Muscle that contracts and pumps blood that circulates through the body.

&part16=Gills
&part16_description=Paired structures used to extract dissolved oxygen from water. Consists of finely divided surface across which water flows and oxygen dissolves into the bloodstream.

&part17=Stomach
&part13_description=Hollow, muscular organ between the esophagus and intestines where food is digested.  True stomach absent in many fishes.