invertebrate Flashcards
(23 cards)
an animal that doesn’t have a backbone
invertebrates
An animal that has a backbone
vertebrates
an organism that eats other organisms or organic matter
consumer
a mass of nerve cells
ganglion
a digestive track
gut
a body cavity that contains the internal organs
coelom
two sides of a body mirrors each other
bilateral symmetry
its body is organized around the center
radial symmetry
you can cannot draw a straight line to divide it equally
asymmetry
they are asymmetrical and have no tissues, gut, or neurons
sponges
hydrozoans, jellyfish, and sea anemones and corals
cnidarians
the simplest worm
flatworm
bodies that are long, slim, and round
roundworm
snails, slugs, clams, oysters, squids, and octopi
mollusks
In which the circulatory fluid is not contained entirely within vessels
open circulatory system
in which the heart circulates blood through a network of blood vessels that form a closed loop
closed circulatory system
a hard external supporting structure
exoskeoton
are called segmented worms because their bodies have segments
annelid worm
an eye composed of many light detectors
compound eye
a system of canals filled with a watery fluid that circulates throughout the body
water vascular system
an internal skeleton made of bone cartilige
endoskeleton
a phase in the life cycle of many animals during which a rapid change form the immature form of an organism to the adult form takes place
metmorphosis
a feeler that is on the head of invertebrates such a insects that senses touch taste and smell
antenna
