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teeth-like scales, make their skin rough Placoid scales
produce slime coating to help with locomotion Mucous glands
skeleton is made of this cartilage
tail is not symmetrical, top part is bigger than bottom Heterocercal
fatty substance found around the liver that helps with buoyancy Squalene
the zig-zag shaped bands of muscle Myomeres
found before the atria, helps collect blood before it goes back to the heart Sinus venosus
first chamber of the heart Atria
second chamber of the heart Ventricle
collects the oxygenated blood and sends it to the various parts of the body Dorsal aorta
the opening where water leaves the body after passing over the gills, there is one for each gill arch Gill slit
opening on bottom dwelling Chondrichthyes where water enters to prevent sucking sand into the gills Spiracles
secretes salts into the rectum for removal from the body Rectal gland
waste product that is retained in the tissue of Chondrichthyes to help with osmotic regulation Urea
substance that is retained in the tissue of Chondrichthyes to help with osmotic regulation Trimethylamine oxide (TMAO)
sense receptors found along the side of the animal that sense water movement Lateral line
sense organs that sense gravity Neuromasts
sense organs on the head that can sense the electric field of other animals Ampullary organs of Lorenzini
copulatory organ for sharks Claspers
one opening for everything to leave the body Cloaca
create and retain eggs inside their body until they hatch Ovoviviparous
provide food for developing young (not just a yolk sac) Viviparous
lay eggs Oviparous
Class of vertebrates that includes sharks, skates, rays and ghost fish Chondrichthyes
Subclass of Chondrichthyes that includes sharks, skates and rays Elasmobranchii
Subclass of Chondrichthyes that includes chimeras, ratfish, and ghost fish Holocephali
Created by: jackie_deane1