CHARACTERISTICS
CHARACTERISTICS
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"Vertebrates"
Notochord: A flexible rod that supports the body; present at least in the embryonic stage.
Dorsal Nerve Cord: Hollow and runs along the back; develops into the brain and spinal cord.
Pharyngeal Slits: Openings in the throat region; used for filter feeding or develop into gills.
Post-anal Tail: Tail extends beyond the anus (may be reduced or absent in adults).
Endoskeleton: Internal skeleton made of cartilage or bone.
Body Plan: Bilaterally symmetrical and triploblastic.
Coelom: True coelom (body cavity lined with mesoderm).
Circulation: Closed circulatory system (blood remains in vessels).
Reproduction: Mostly sexual; sexes usually separate.
Habitat: Found in marine, freshwater, and terrestrial environments.
CLASSIFICATIONS
CLASSIFICATIONS
Class Chondrichthyes
Class Chondrichthyes
Cartilagenous fish (got cartilage instead if bones)
Commonly: among predators fishes
Example: sharks and rays fish
Habitat: marine (shallow water to deep water)
Class Osteichthyes
Class Osteichthyes
Bony fish (has bones unlike cartilage fishes)
Commonly: known among fishes with Paired fins, Many teeth, Dermal skin
Example: tilapia, lobe-finned fish
Habitat: marine, freshwater
Class Amphibia
Class Amphibia
Tetrapods (4-legged animals) with no amniotic sac
Commonly: spends time on both land and in water
Example: frog, toad
Habitat: land and water
Class Reptilia
Class Reptilia
Exothermic, low metabolism rate
Produces amniotic egg
Skin made of protein (keratin)
Got molting period (shedding skin)
Has teeth for holding prey, eye for night vision, tounge for smell and taste
Example: crocodile, lizard
Habitat: water and land
Class Aves
Class Aves
Endothermic, high metabolism rate
Has feathers, forelimbs that evolved into wings
Example: pigeon, columba mayeri
Habitat: land, air, water
Class Mammalia
Class Mammalia
Endothermic, high metabolism rate
Has hair, mammary glands that produces milk
Has 4 chambered heart, 4 limbs, well developed brain
High capability for locomotion
Example: lion, horses
Habitat: land and water
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