animals

Question 1

consumer

Answer 1

an organism that eats other organisms or organic matter

Question 2

invertebrate

Answer 2

an animal that has a backbone

Question 3

invertebrates

Answer 3

an animal that does not have a backbone

Question 4

ganglion

Answer 4

a mass of nerve cells

Question 5

gut

Answer 5

the digestive tract

Question 6

coelom

Answer 6

a body cavity that contains the internal organs

Question 7

bilateral symmetry

Answer 7

the property of being divisible into symmetrical halves on either side of a unique plane.

Question 8

radial symmetry

Answer 8

symmetry around a central axis, as in a starfish or a tulip flower

Question 9

asymmetry

Answer 9

lack of equality or equivalence between parts or aspects of something; lack of symmetry.

Question 10

sponges

Answer 10

Any of numerous aquatic, chiefly marine invertebrate animals of the phylum Porifera

Question 11

cnidarians

Answer 11

an aquatic invertebrate animal of the phylum Cnidaria, which comprises the coelenterates.

Question 12

flatworms

Answer 12

a group of soft-bodied, usually much flattened invertebrates.

Question 13

roundworms

Answer 13

parasitic worms that comprise the phylum nematoda

Question 14

mollusks

Answer 14

an invertebrate of a large phylum which includes snails, slugs, mussels, and octopuses. They have a soft unsegmented body and live in aquatic or damp habitats, and most kinds have an external calcareous shell.

Question 15

open circulatory system

Answer 15

pumps blood into a cavity called a hemocoel where it surrounds the organs and then returns to the heart(s) through ostia (openings)

Question 16

closed circulatory system

Answer 16

the blood stays within blood vessels.

Question 17

annelid worms

Answer 17

a segmented worm of the phylum Annelida, such as an earthworm or leech.

Question 18

exoskeloton

Answer 18

rigid external covering for the body in some invertebrate animals, especially arthropods, providing both support and protection.

Question 19

compound eye

Answer 19

an eye consisting of an array of numerous small visual units, as found in insects and crustaceans.

Question 20

antenna

Answer 20

a conductor by which electromagnetic waves are sent out or received, consisting commonly of a wire or set of wires

Question 21

metamorphosis

Answer 21

striking change of form or structure in an individual after hatching or birth.

Question 22

endoskeleton

Answer 22

an internal skeleton, such as the bony or cartilaginous skeleton of vertebrates.

Question 23

water vascular system

Answer 23

a system of vessels in echinoderms containing a circulating watery fluid that is used especially for the movement of tentacles and tube feet.