Invertebrate Flashcards
Vertebrates
an animal that has a backbone
Invertebrtes
animals without a backbone
Consumer
an organism that eats other organisms or organic matter.
Ganglion
a mass of nerve cells
gut
the digestive tract
coelom
a body cavity that contains the internal organs
Bilateral Symmetry
both sides of the body mirror each other
radial symmetry
body is organized around the center
asymmetry
cannot draw a straight line to divide its body into two ornmore equal parts.
sponges
feed on tiny plants because they cannot move in search for food and do not have a gut
Cnidarians
all have tentacles covered with stinging cells
flatworms
divided into three major classes; planarians, flukes, and tapeworms
roundworms
they have bilateral symmetry. have a simple nervous system.
mollusks
snails, slugs, clams, oysters, squids, and octopuses. most live in the ocean but some live on land.
Open circulatory system
a simple heart pumps blood through blood vessels that empty into the sinuses, or spaces into the animals body.
