Sea Urchins
Somewhat flattened, globular echinoderms, having thin, brittle shells of calcareous plates. They are useful models for studying FERTILIZATION and EMBRYO DEVELOPMENT.
Year introduced: 1972
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Subheadings:
Tree Number(s): B01.050.500.408.578
MeSH Unique ID: D012617
Registry Number: txid7625
Entry Terms:
- Sea Urchin
- Urchin, Sea
- Urchins, Sea
- Echinoidea
- Echinoideas
- Sand-Dollar
- Sand Dollar
- Sand-Dollars
- Clypeasteroida
- Clypeasteroidas
- Sand Dollars
- Dollar, Sand
- Dollars, Sand
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