Fish

capillaries

O2 diffuses into the blood through ___________ in the gills . CO2 diffuses out

jawless fish

fish in class agnatha are also known as

swim bladder

helps them to stay afloat at a certain depth. Air-filled organ.

lampreys hagfish

2 examples of jawless fish

fresh salt

Fish can live in _______ water or ______ water

O2 CO2

Fish take _____ from the water and give off _____

receives pumps

In a fish's two-chambered 1 side _________ blood in the heart and the other side _______ blood to the body

mucous

Jawless fish secrete _______ when they are disturbed

sharks skates rays

List 3 examples of cartilaginous fish

largest

class osteichthyes is the __________ group of fish

fish

____ are vertebrate animals with fins, gills, and usually scales.

Gills absorb the O2 gas. O2 dissolves into the blood through capillaries in the gills CO2 diffuses out. Deoxygentated blood becomes oxygenated

briefly describe how the circulatory system works

Water moves into the mouth and across the gill filaments. Gills absorb the O2 gas that has dissolved in the water

briefly describe how the respiratory system works

cold-blooded

ectothermic; body temperature changes with the surroundings. Activity also changes with temperature.

lobe-finned

few known species; muscular/ thick fins/ air sacs or lungs.

two gills closed

fish have a _____ chambered heart, ______ and a _______ system

jaws scales fins worm cartilage round hooked

fish in class agnatha have no _____, no _________, paired _____, are _______-like creatures, have skeletons made of __________, have ________ mouths, and _________ teeth

cartilaginous fish

fish in class chondrichthyes are also known as

cartilage jaws scales fins denticles

fish in class chondrichthyes have endoskeletons made of ___________, ______, _________, and paired _______, and ______________

bony fish

fish in class osteichthyes are also known as

bone jaws scales fins swim swim bladder

fish in class osteichthyes have an endoskeleton made of _______, have ______, _________, paired ______, do not need to _______ constantly, and have a ______ __________ to control buoyancy.

goldfish trout

list 2 examples of fish from class osteichthyes

lungfish coelacanths

list 2 examples of lobe-finned fish

class agnatha class chondrichthyes class osteichthyes

list the three classes of fish

ray-finned lobe-finned

list the two types of bonyfish

ray-finned

more common; paired fins with thin rays of bone

nostrils

not for breathing but for smelling

scales

overlapping plates, used for protection. Grow larger with the fish.

fins

paired ______ control finer movements

lateral line

sensory organ used to detect vibrations and pressure

swim swim bladder

sharks must ______ constantly to stay alive, and have no ______ ________

ocean flapping tail

skates and rays rest and feed on the _______ floor, propel by "__________" paired fins which look like wings, and have a long, narrow _______.

parasites scavengers

some jawless fish are ___________, most are ____________.

denticles

tooth-like structures on skin of cartilaginous fish