Unit 10B Classification Of Organisms Animals Vocabulary

Front 1

Sponge

Back 1

Organisms that are asymmetrical, sessile, filter feeders with few specialized cells.

Front 2

Hermaphrodites

Back 2

An organism that has both male and female sexual organs.

Front 3

Cnidarians

Back 3

Organisms that are radially symmetrical and have specialized stinging cells on tentacles for capturing prey. They can reproduce both sexually and asexually.

Front 4

Platyhelminths

Back 4

Flatworms with bilateral symmetry.

Front 5

Nematodes

Back 5

Roundworms with a one way digestive tract.

Front 6

Mulluska

Back 6

Soft bodied organisms, usually having an external shell.

Front 7

Arthropoda

Back 7

Organisms with exoskeletons and jointed appendages.

Front 8

Echinoderms

Back 8

Spiny skinned organisms.

Front 9

Phylum Chordata

Back 9

An organism that has a dorsal hollow nerve cord, a notochord, pharyngeal pouches, and a tail.

Front 10

Hollow nerve cord

Back 10

(The spinal cord) It runs along the back part of the body. It's nerves branch off a regular intervals that connect to internal organs, muscles and sense organs.

Front 11

Notochord

Back 11

A long supporting rod that runs down the body just below the nerve chord. Usually only present during the embryonic stage of development of an organism.

Front 12

Pharyngeal Pouches

Back 12

Paired structures in the throat region of an organism that may develop into gill slits used for gas exchange in fish and amphibians.

Front 13

Invertebrate

Back 13

Organisms that do not have backbones.

Front 14

Tunicates

Back 14

Soft bodied marine organisms that have the same characteristics as chordates as larvae.

Front 15

Lancelets

Back 15

Small fish like organisms that live half buried on the bottom of the ocean. They do not have fins or a true heart, but they do have gill slits.

Front 16

Agnatha

Back 16

Jawless fish.

Front 17

Chondrichthyes

Back 17

Fish with skeletons of cartilage.

Front 18

Osteichthyes

Back 18

Bony ray- finned fishes.

Front 19

Amphibia

Back 19

The vertebrate class of organisms that lacks scales, claws, and fur.

Front 20

Reptilia

Back 20

The vertebrate class of organisms that have dry scaly skin, and have lungs.

Front 21

Aves

Back 21

The vertebrate class of organisms that have feathers, wings, and legs covered with scales.

Front 22

Mammalia

Back 22

The vertebrate class of organisms that have hair and nourish their young with milk.

Front 23

Animals

Back 23

Eukaryotic, multicellular, heterotrophs whose cells lack cell walls.

Front 24

Invertebrates

Back 24

Animals without backbones.

Front 25

Vertebres

Back 25

Animals with backbones.

Front 26

Asymmetrical

Back 26

When an organism's body has no symmetry.

Front 27

Symmetrical

Back 27

When one half of the organism matches the other half across a dividing plane.

Front 28

Radial Symmetry

Back 28

When an organism's body parts repeat around the center axis of the body.

Front 29

Bilateral Symmetry

Back 29

When animal can only be divided by one plane down the middle into two equal halves.

Front 30

Cephalization

Back 30

The concentration of sense organs and nerve cells are at the front end of the body.