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BIOL212
Majors animal: Anatomy of the sea cucumber (matching)
| Structure | Function |
|---|---|
| Tentacles | Food collection |
| Ring canal | Portion of water vascular system encircling the junction of pharynx and stomach |
| Ampullae | Provide hydraulic pressure for movement of tube feet |
| Pharynx | Transports food from mouth to stomach |
| Madreporite | Entrance to the water vascular system that serves as a pressure regulator; floats freely within the coelomic cavity and is not connected to the outer body wall |
| Stomach | Extremely reduced in holothurians; site of food storage and initiation of digestion |
| Intestine | Final digestion of food received from stomach and subsequent nutrient absorption |
| Gonad | Produces gametes for reproduction |
| Tube feet | Locomotion |
| Respiratory trees | Gas exchange |
| Cloaca | Pumps a ventilating current of seawater into and out of respiratory trees |
| Anus | Regulates egestion of undigested food (feces) from the body |