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9 Cards in this Set
- Front
- Back
COELOM |
Fluid-filled internal body cavity |
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Deuterostomes include |
echinoderms, hemichordates, and chordates |
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Gastrulation |
Indentation formation in early embryonic stage that later forms into gut. |
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Three Basic tissue layers of embryo |
Ectoderm, mesoderm, endoderm |
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Deuterostomes refers to |
"second-mouth" in which mouth forms opposite from blastopore. |
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Cephalochordates and Urochordates |
Chordates that lack bony or cartilaginous skeletons, filter feeders |
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Five fundamental features of Chordates |
1. notochord 2. pharyngeal slits 3. endostyle or thyroid gland 4. dorsal hollow nerve chord forming central nervous system 5. postanal tail |
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Notochord |
A long axial rod composed of connective tissue all around fluid-filled space. More derived vertebrates will replace it with vertebral column. |
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Pharyngeal Slits |
Possible feeding accessory in basal chordates, can form gill slits. Disappear in many chordates before birth. |