Bio 100 Lesson 23

Front 1

Crinoidea

Back 1

Phylum Echinodermata, Stalked sea lilies and feather stars

Front 2

Holothuroidea

Back 2

Phylum Echinodermata, Sea cucumbers with feeding tentacles

Front 3

Echinoidea

Back 3

Phylum Echinodermata, Sea urchins, sand dollars

Front 4

Ophiuroidea

Back 4

Phylum Echinodermata, Brittle stars with central disc and radiating arms

Front 5

Asteroidea

Back 5

Phylum Echinodermata,Sea stars (star fish)

Front 6

Notochord

Back 6

A rod of supporting tissue located near the dorsal side of the organism. Is usually composed of some kind of connective tissue like protein strands, cartilage, or bone.

Front 7

Nerve cord

Back 7

composed of a collection of nerve fibers that run down the length of the organism on the dorsal side. A hollow tube filled with a fluid that serves to maintain its shape.

Front 8

Pharyngeal pouches

Back 8

Located in the neck region of the organism. Consists of folds of tissue that in fishes and amphibians become the gills in the adult stage. In other organisms, like reptiles and mammals, they are only present during the embryonic stages.

Front 9

Post-anal tail

Back 9

An extension of the notochord past the anus. Contains the connective tissue of the notochord, often composed of muscle and nerve tissue, and covered by an epithelium (skin). Used as an aid in locomotion. In humans the post-anal tail is only present during a specific embryonic stage. Is not present in the adult stage.

Front 10

Subphylum Cephalochordata

Back 10

Phylum Chordata, Sea lancelets

Front 11

Subphylum Urochordata

Back 11

Phylum Chordata, Sea squirts

Front 12

Subphylum Vertebrata

Back 12

Phylum Chordata, Marine and terrestrial animals in many different habitats

Front 13

Class Ostracoderma

Back 13

Subphylum Vertebrata, Extinct, jawless, finless, armored fish

Front 14

Class Agnatha

Back 14

Subphylum Vertebrata, Extant jawless, finless fishes; e.g. lamprey, hagfish

Front 15

Class Placoderma

Back 15

Subphylum Vertebrata, Extinct jawed fishes, bony plates, paired fins

Front 16

Class Chondrichthyes

Back 16

Subphylum Vertebrata, Cartilaginous fishes—skeleton of cartilage; e.g. shark, stingray, skate

Front 17

Class Osteichthyes

Back 17

Subphylum Vertebrata, Bony fishes—skeleton of bone; e.g. perch, trout, bass

Front 18

Class Amphibia

Back 18

Subphylum Vertebrata, amphibians

Front 19

Class Reptilia

Back 19

Subphylum Vertebrata, reptiles

Front 20

Class Aves

Back 20

Subphylum Vertebrata, birds

Front 21

Class Mammalia

Back 21

Subphylum Vertebrata, mammals