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22 Cards in this Set
- Front
- Back
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notochord
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flexible rod located between digestive track and nerve chord
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Dorsal Hollow Nerve Chord
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eventually develops into brain and spinal chord
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Invertebrate Chordates
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lack true backbone, suspension feeders
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Urochordata
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tunicates, sea squirts, sessile as adults
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Chephelochodata
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lanceletes, amphixious, burrow into ocean floor
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craniate
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show pronounced cephalization
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Myxini
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hagfish, scavengers, lack jaws and vertebrae, notochord is present life long, craniate
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cephalization
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the concentration of sense organs, nervous control, etc., at the anterior end of the body, forming a head and brain, both during evolution and in the course of an embryo's development.
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Chondrichthyes
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Cartilaginous fish, ectotherms, well developed jaws, lateral line system (sonar), sharks/skates/rays
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Osteichthyes
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ossified endoskeleton, scales, swim bladder, ectotherms
lobe finned or ray finned |
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Neural Crest
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stem cells.
a group of ectodermal cells that develop into a variety of tissues, including spinal and autonomic ganglia, connective tissue around the brain and spinal cord, and parts of the facial bones. |
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Amphibia
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first tetrapods, frogs/toads/salamanders, undergo metamorphosis, ectotherms, external fertilization (lack shelled eggs), 2-3 chambered heart
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tetrapod
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land animal
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Reptilla
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internal fertalization, 3 chambered heart, scales with keratin
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Amniotes
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eggs have shells, extaembryonic membranes with acid gas exchange, provides nutrients and protection.
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Mamallia
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hair, mammary glads, endothermic, 4 chambered heart,large brains, teeth differentiation, diaphragm
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Monotrems
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egg layers (platypus)
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Marsupials
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embryonic development completed in pouch (kangaroos)
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Eutharians
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Placental mammals
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Epithelial Tissue
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covers body, lines organs and cavities
forms glands held together by tight junctions |
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basement membrane
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anchors one side of epithelial tissue to the tissues beneath
extacellular matrix made up of protein pollysacherides |
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Connective Tissue
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binds and supports other tissues
consists of cells loosely organized into extracellular matrix |
