Invertebrate/animal vocab

Question 1

An animal that does not have a backbone.

Answer 1

Invertebrates

Question 2

A mass of nerve cells.

Answer 2

Ganglion

Question 3

A body cavity that contains the internal organs.

Answer 3

Coelom

Question 4

A circulatory system in which the circulatory fluid is not contained entirely within vessels.

Answer 4

Open circulatory system

Question 5

A circulatory system in which the heart circulates blood through a network of blood vessels that form a closed loop.

Answer 5

Closed circulatory system

Question 6

A hard, external, supporting structure.

Answer 6

Exoskeleton

Question 7

An eye composed of mainly light detectors.

Answer 7

Compound eye

Question 8

A feeler that is on the head of an invertebrate, such as a crustacean or an insect, that senses tough, taste, or smell.

Answer 8

Antenna

Question 9

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 takes place.

Answer 9

Metamorphosis

Question 10

An internal skeleton made of bone or cartilage.

Answer 10

Endoskeleton

Question 11

A system of canals filled with a watery fluid that circulates throughout the body of an echindoerm.

Answer 11

Water vascular system

Question 12

An animal that has a backbone.

Answer 12

Vertebrates

Question 13

An organism that eats other organisms or organic matter.

Answer 13

Consumer

Question 14

A digestive tract.

Answer 14

Gut

Question 15

Its body is not organized around the center.

Answer 15

Asymmetry

Question 16

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

Answer 16

Bilateral symmetry

Question 17

Symmetry around a central axis, as in a starfish or a tulip flower.

Answer 17

Radial symmetry

Question 18

A primitive sedentary aquatic invertebrate with a soft porous body that is typically supported by a framework of fibers or calcareous or glassy spicules.

Answer 18

Sponges

Question 19

An aquatic invertebrate animal of phylum Cnidarian, which comprises the coelenterates.

Answer 19

Cnidarians

Question 20

A worm of phylum which includes the Parisians together with the parasitic flukes and tapeworms.

Answer 20

Flatworms

Question 21

A nematode, especially a parasitic one found in the intestines of mammals.

Answer 21

Roundworms

Question 22

An invertebrate of a large phylum which include snails, slugs, mussels, and octopuses.

Answer 22

Mollusks

Question 23

A large phylum, with over 22,000 extant species including raw worms, earthworms, and leeches

Answer 23

Annelid worms