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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 |