Principles of Life 3e Student Resources is no longer available and it was replaced by Biology and Life Sciences.
Media Clip 22.5 Explosive Extrusion of Ribbon Worm Proboscis
This video shows a nemertean worm extruding its proboscis.
Please note: If you have been assigned this activity by your instructor, you must complete it within LaunchPad (or your school's learning management system) in order to receive credit.
Textbook Reference: Key Concept 22.3 Protostomes Have an Anterior Brain and a Ventral Nervous System, p.536