Skip to main content
. Author manuscript; available in PMC: 2009 Jun 8.
Published in final edited form as: Cell. 2008 Feb 22;132(4):697–710. doi: 10.1016/j.cell.2008.01.040

Figure 5. Remodeling Pre-existing Structures.

Figure 5

A trunk fragment of the land planarian Bipalium is shown undergoing remodeling of pre-existing tissues (see text) and the regeneration of the missing head and tail. The animal is drawn at the same magnification for each of the days illustrated. Note the progressive increase in length and decrease in width of the fragment. These changes result in the regeneration of all the missing structures and ultimately reach the appropriate dimensions relative to the sizes of the newly regenerated head and tail. The table indicates days after amputation and the corresponding change in length to width ratio (L:W) for each specimen pictured. This was accomplished by digitizing the original, drawn-to-scale image after Morgan (1900) and measuring along the midline for length and along the geometric center from lateral edge to lateral edge for width.