life science, ch. 11

20 terms by GRAYJA

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chordate

all members of the phylum are called this . at some point in their lives they will have a notochord and slits in the throat area

notochord

a flexible rod that supports a chordate's back

vertebrae

like beads on a string these make up your spine

ectotherm

an animal whose body does not produce much internal heat FISHES AMPHIBIANS REPTILES

endotherm

an animal whose body regulates its own temperature by controlling the internal heat it produces

fish

a vertebrae that lives in water and uses fins to move - has fins, ectotherms usually, gills, and scales

cartilage

tissue that is more flexible than bone

swim bladder

an internal , gas-filled sac that helps the fish stay stable at different depths in the water (bonyfish)

amphibian

a vertebrate that is ectothermic and spends its early life in water "double life"

tadpole

the larva of a frog or a toad

lung

the organs of air-breathing vertebrates in which oxygen gas and carbon dioxide gas are exchanged between the air and the blood

atrium

the 2 upper chambers of the heart

ventricle

pumps blood out to the lungs and body - lower chamber

habitat

the specific environment in which it lives

fossil

the hardened remains or other evidence of a living thing that existed a long time ago

sedimentary rock

hardened layers of sediments

paleontologist

the scientists who study extinct organisms , examine fossil structures & make comparisons to present day organisms

reptile

ectothermic vertebrae that has lungs and scaly skin

kidneys

organs that filter wastes from the blood

amniotic egg

an egg with a shell and internal membranes that keep the embryo moist

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