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Fish

Terms in this set (21)

agnathan
lamprey and hagfish
agnathan characterisitics
jawless, notocord, sucker mouth, no scales, cartilage skeleton, isotonic, pineal eye, external fertilizaton
lamprey
parasitic, teeth can cut skin
hagfish
bottom dwellers, must enter through an opening, can exude slime to escape
chondricthyes characteristics
ectothermic, oily liver (buoyancy), swim forward, venemous spines, placoid scales
chond immune system
liver oil = breast milk, strong
chond senses
ampulae of lorenzinni, sharp vision, nostrils and lateral line
chond reproduction
internal fertilization, claspers transfer sperm
chond respiration
spiracles
chond osmo regularity
retain area and have a rectal gland
ostcicthyes characterisitics
bones, can swim any direction, some have barbels, no eyelids
ostc scales
ganoid (diamond), cycloid (circle), clenoid (spiney)
ostc circulation
single loop, 2 circulatory beds (gills and body), 2 chambered heart, atrium and ventricle,
conus arteriosus
area that smooths the pulsation and adds still more force
sinus venosus
collection area to reduce the resistance of blood flow to the heart
oviparity
deposit eggs on the ocean floor
ovoviviparity
eggs hatch and babys develop inside the body, eat eachother
viviparity
eggs hatch and babys develop inside the body and eat placenta for ourishment
ostc respiration
current counter flow, 80% oxygen
ostc nervous system
forebrain (olfactory and cerebrum), mid brain (optic lobe), hind brain (cerebellum and medulla oblongata)
rectal gland
removes sodium chloride from the blood
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