Mount Holyoke College

Flatworm regeneration:
Two-headed planaria

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(Two movies on this page)

 

These time-lapse videos were made by Joua Yang (Bio 305, fall 99). Joua became fascinated with flatworms, and studied their remarkable regenerative capabilities. This two-headed animal was created by making a slice in the head. The wound healed in such a way as to form two complete heads--each with two obvious eyespots (these animals are known for their cross-eyed "faces"). As the animal crawls through a film of water, notice how each head can move independently from each other.The first movie is a low-power view, and the second video is of the same animal at a greater magnification.