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23 Cards in this Set
- Front
- Back
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Characteristics of chordates |
1. notochords 2. dorsal, hollow nerve chord 3. muscular, post-anal tail 4. Pharyngeal slits or clefts |
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Urochordata |
subphylum of chordates
ancestral chordates marine suspension feeders sea squirts or turnicates
= most chordates resemble them when theyre in the womb |
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Cephalochordata |
the lancelets
blade-like shape adults have 4 hallmark characteristcs of chordates |
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Craniates |
chordates that have a head skull, brain, eyes, & sensory organs
most primitive still in existense-- hagfish |
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Vertebrates |
chordates with backbones craniates + backbone enclosed spinal chord elaborate skull |
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Agnatha |
vertebrate without jaws |
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Ostracoderms |
armored, jawless fish defensive plates of bone on their skin |
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Gnathostomes |
vertebrate with jaws! increased predation |
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Chondrichthyes |
cartlidge fish! skeleton of primarily cartlidge sharks, reys, etc |
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Osteichthyses |
bony fish |
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Tetrapods |
gnathostomes with four limbs four limbs, feet with digits ears for detecting sound |
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Amphibia |
"double life" transition from water to land moist skin that aids in gas exchange |
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Urodela |
order of amphibia - salamanders with tails |
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Anura |
order of amphibia - frogs//no tails |
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Apoda |
order of amphibia caecilians, leggless (like worms) |
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Amniotes |
tetrapods with terrestrially adapted egg
living members are the reptiles, birds, and the mammals
The amniotic egg contains specialized |
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Ectothermic |
being able to absorb heat from outside environment external heat is main source of body heat
(reptiles) |
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Endothermic |
internal heat source capable of keeping the body warm through metabolism |
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Aves |
birds! class of chordata adapted for flight wings and feathers
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Mammalia |
the mammalsssss :D mammary glands hair diaphragm |
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Monotremes |
group of egg laying mammals |
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Eutherians |
mammals with placenta longest period of pregnancy complete embryonic development within uterus |
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Primates |
humans are primates group of mammals A large brain and short jaws |
