invertabrate Flashcards
an animal that does not have a back bone
invertabrate
an animal that has a back bone
vertabrate
an organism that eats other organisms or organic matter
consumer
a mass of nerve cells
ganglion
the digestive tract
gut
a body cavity that contains the internal organs
coelom
two sides of the body mirror each other
bilateral symmetry
the body is organized around the center
radial symmetry
can’t draw a straight to divide its body
asymmetry
simplest invertebrate
sponges
hydrozoans, jellyfish, sea anemones, and corals
cnidarians
simplest worm
flat worm
round bodied worm
roundworms
snails slugs clams oysters squids and octopi
mollusk
a circulatory system in which the circulatory fluid is not contained entirely within vessels
open circulatory system
a circulatory system in which the heart circulates blood through a network of blood vessels that form a closed loop
closed circulatory system
often segment worms because they have segments
annelid worm
a hard external supporting structure
exsokeleton
an eye composed of many light detectors
compound eye
a feeler that is on the head of an invertebrate that senses touch taste or smell
antenna
a change in which an animal takes its mature form
metamorphosis
an internal skeleton made of bone or cartilage
endoskeleton
a system of canals filled with a watery fluid that circulates throughout the body of an echinoderm
water vascular system
