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.
Closed circulatory system
a heart pumps blood through a network of blood vessels that form a closed loop.
annelid worms
often called segmented worms because their bodies have segments.
exoskeleton
external structure that covers the outside of the body
compound eye
an eye composed of many light detectors
antenna
a feeler that senses touch, taste, or smell
Metamorphosis
as an develops, it changes form.
Endoskeleton
an internal skeleton
Water vascular system
a system of canals filled with fluid.
