in vertebrate animal vocab Flashcards
(23 cards)
an animal that has a backbone
vertebrates
has no backbone
invertebrates
an organism that eats other organisms or organic matter
consumer
a mass of nerve cells
ganglion
the digestive tract
gut
a body canvity that contains the internal organs
coelom
the two sides of its body mirror each other
bilateral symmetry
its body is organized around the center
radial symmetry
cannot draw a straight line to divide its body into two or more equal parts
asymmetry
most have a skeleton made of small, hard fibers
sponges
have complex tissues and a gut for digesting food
cnidarians
have bilateral symmetry, clearly defined head and two large eyespots
Flatworms
have bodies that are long, slim, and round have bilateral symmetry
Roundworms
fit into the gastropods and the bivalves and cephalopods
Mollusks
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
have bilateral symmetry, closed circulatory system have a brain
Annelid worms
a hard, external, supporting structure
Exoskeleton
an eye composed of many light detectors
Compound eye
a feeler that is on the head of an invertebrate and that senses toch, taste or smell
Antenna
a phase in the life cycle of many animals during which a rapid change from the immature form of an organism to the adult form takess place
Metamorphosis
an internal skeleton made of bone and cartilage
Endoskeleton
asystem of canals filled with a watery fluid that circulates throughout the body of an echinoderm
Water vascular system
