Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
21 Cards in this Set
- Front
- Back
|
individual segment of a backbone
|
vertebra
|
|
|
earliest fish; had backbone but no jaws or paired fins
|
agnathan
|
|
|
early fish; first to exhibit jaws
|
acandothian
|
|
|
strong, lightweight, flexible connective tissue
|
cartilage
|
|
|
term that describes an organism with the ability to live on land
|
terrestrial
|
|
|
extinct crocodile-like reptile from which the dinosaurs evolved
|
thecodont
|
|
|
the single super-continent of the Triassic period that included all presently known continents
|
Pangaea
|
|
|
referring to an animal whose body temperature is determined by the temperature of the environment
|
ectothermic
|
|
|
refers to an animal that generates its own body heat
|
endothermic
|
|
|
extinct order of reptiles thought to be endothermic that likely gave rise to mammals
|
therapsid
|
|
|
fingerlike projection from a gill where respiratory gases enter and leave the blood
|
gill filament
|
|
|
opening at the rear of a fish's cheek cavity where water exits
|
gill slit
|
|
|
arrangement in fish respiratory system where water going over the gills and blood in the gill filaments flows in opposite directions
|
countercurrent flow
|
|
|
tube-like structure in the kidneys that filters wastes from the body and retains useful molecules; also regulates the body's salt and water balance
|
nephron
|
|
|
specialized sensory system running the length of both sides of a fish's body
|
lateral line
|
|
|
hard plate that covers the gills on each side of the head of bony fishes
|
operculum
|
|
|
the gas-filled sac of bony fishes used to regulate their buoyancy
|
swim bladder
|
|
|
group of bony fishes with highly mobile fish, thin scales, a swim bladder, and asymmetrical tails; largest group of living fish
|
teleost
|
|
|
internal, baglike respiratory organ of a vertebrate that enables gas exchange between the air and the blood
|
lung
|
|
|
vessel that carries oxygen-rich blood from the lungs to the heart
|
pulmonary vein
|
|
|
thick wall that divides the heart's atrium or ventricle into right and left halves
|
septum
|
