Chapter 24 Flashcards
1
Q
Nerve Cord
A
Cord of nerve tissue that runs along back, hollow, filled with fluid
2
Q
Notocord
A
Cord between nerve cord and digestive tract; stiff, flexible, can be replaced by skeleton in developing embryo
3
Q
Pharyngeal Gill slits
A
Grooves in pharynx of developing embryo; may become gills
4
Q
Post anal tail
A
Muscle; nerve cord that extend past anus of developing embryo
5
Q
Tunicates
A
No skull No backbone Simple heart Gill slits Ectothermic External fertilization
6
Q
Lancelets
A
No skull No backbone Simple heart Gill slits Ectothermic External fertilization
7
Q
Endothermic
A
Heat needed to maintain temperature comes from environment; cold blooded
8
Q
Endothermic
A
Heat needed to maintain temperature comes from organism; warm blooded
9
Q
Hagfishes
A
Skull No backbone gills 2-chamber heart Ectothermic External fertilization
10
Q
Lampreys
A
Skull Backbone Gills 2-chamber heart Cartilage skeleton Ectothermic External fertilization
11
Q
Cartilaginous Fishes
A
Skull Backbone Gills 2-chamber heart Cartilage skeleton Ectothermic Internal fertilization
12
Q
Ray-finned fishes
A
Skull Backbone Gills 2-chamber heart Bone skeleton Ectothermic External fertilization
13
Q
Lungfishes
A
Skull Backbone Gills and lungs 2-chamber heart Bone skeleton Ectothermic External fertilization
14
Q
Amphibians
A
Skull Backbone Skin, gills or lungs 3-chamber heart Bone skeleton Limbs Ectothermic External or internal fertilization
15
Q
Reptiles
A
Skull Backbone Lungs 3-chamber heart Bone skeleton Ectothermic Limbs Internal fertilization shelled egg in embryo development
