Amphioxus
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15 terms
Terms | Definitions |
|---|---|
 Buccal cirri | contain receptor, possibly reject oversized particples |
| Oral hood | monitor particle size of food + debris |
| Vestibule | cavity of oral hood |
| Wheel organ | creates currents carrying mucus entrapped particles and directs them into pharynx |
| Velum/Velar tentacle | final screening barrier through which particles pass into pharynx |
| Pharynx | gas exchange |
| Pharyngeal bars | support walls of pharynx |
| Myomere | Striated muscle block, responsible for movement |
| Midgut diverticulum | digestive activity |
| Ileocolic ring | Moves mucus + food to hindgut |
| Hindgut | further digestion and absorption |
| Atriopore | Water exits here |
| Notochord | Stiffens body, longitudinal support |
| Epibranchial groove | Traps suspended particles with mucus and directs them into digestive tract |
| Endostyle | produces mucus and synthesizes iodine-binding proteins |
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