Invertebrates Animal Vocabulary

Question 1

Vertebrates

Answer 1

represent the overwhelming majority of the phylum Chordata, with currently about 64,000 species described

Question 2

Invertebrates

Answer 2

animals that neither possess nor develop a vertebral column, derived from the notochord

Question 3

Consumer

Answer 3

organisms that receive energy and nutrients by consuming other organisms

Question 4

Ganglion

Answer 4

located outside the brain and spinal chord and regulate organs and glans

Question 5

Gut

Answer 5

a tube that transfers food the the digestive system

Question 6

Coelom

Answer 6

the main body cavity in most multicellular animals and is positioned inside the body to surround and contain the digestive tract and other organs

Question 7

Bilateral symmetry

Answer 7

a characteristic of animals that are capable of moving freely through their environments

Question 8

Radial symmetry

Answer 8

The body plans of echinoderms, ctenophores, cnidarians, and many sponges and sea anemones show this

Question 9

Asymmetry

Answer 9

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

Question 10

Sponges

Answer 10

They are multicellular organisms that have bodies full of pores and channels allowing water to circulate through them, consisting of jelly-like mesohyl sandwiched between two thin layers of cells

Question 11

Cnidarians

Answer 11

they are predominantly marine species. Their distinguishing feature is cnidocytes, specialized cells that they use mainly for capturing prey

Question 12

Flatworms

Answer 12

a phylum of relatively simple bilaterian, unsegmented, soft-bodied invertebrates

Question 13

Roundworms

Answer 13

a diverse animal phylum inhabiting a very broad range of environments

Question 14

Mollusks

Answer 14

organisms such as snails, octopuses, squid, clams, scallops, oysters, and chitons.

Question 15

Open circulatory system

Answer 15

pump blood into a hemocoel with the blood diffusing back to the circulatory system between cells

Question 16

Closed circulatory system

Answer 16

have the blood closed at all times within vessels of different size and wall thickness

Question 17

Annelid worms

Answer 17

lso known as the ringed worms or segmented worms, are a large phylum, with over 17,000 extant species including ragworms, earthworms, and leeches

Question 18

Segment

Answer 18

each of the series of similar anatomical units of which the body and appendages of some animals are composed

Question 19

Exoskeleton

Answer 19

the external skeleton that supports and protects an animal’s body, in contrast to the internal skeleton

Question 20

Compound eye

Answer 20

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

Question 21

Antenna

Answer 21

are paired feelers connected to the front segments of crustaceans and insects

Question 22

Metamorphosis

Answer 22

hatching, involving a conspicuous and relatively abrupt change in the animal’s body structure through cell growth and differentiation

Question 23

Endoskeleton

Answer 23

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

Question 24

Water vascular system

Answer 24

a hydraulic system used by echinoderms, such as sea stars and sea urchins, for locomotion, food and waste transportation, and respiration