Media Clip 22.6 Leeches Feeding on Blood

This video shows leeches feeding on a human arm.

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.538