EEMB: Animals - Vertebrates Flashcards
Major characteristics of verterbrates
Dorsal nervous system internal skeleton vertebral column organs in a ceolom circulatory system
T/F: True powered flight evolved in the winged insects
FALSE - it started happening in vertebrates
What separates the vertebrates from other chordates?
spinal column
cranium
First jaws appear in what class? What did it develop from?
placoderm (placodermi)
modification of gill arches
What period was age of the fishes?
Devonian period
What other fishes evolved during the Devonian period with the placoderms
ray-finned fishes
lobe-ray fishes
Class Chondrichthyes include what animals?
sharks
The skeleton of chondrichthyes are composed of what? This means the lack true bone.
cartilage
The bony fish are class
osteichthys
T/F: bone is a living tissue
True
Evolutionary structure that helps with swimming in osteichthys
swim bladder
The swim bladder has many fucntions (list them in your head) but now its main function is there for _______
neutral buoyancy
other functions: respiration, hearing, etc.
How did vertebrates colonize land? Which were the first animals to get such characteristics
Swim bladder as primitive lung
Developed jointed appendages
lungfish
Coelocanths
Tetrapods describe what type of animals
4 limb animals (mainly terrestrial)
What the 4 classes of tetrapods?
amphibians
reptiles
aves
mammals