Sponge Small 320×305 Medium 640×610 Large 1024×975 Download Tiff Original 2400×2286 | (252.7 KB) Description The sponge, a many celled animal, begins its life as a single-cell, the egg. Keywords sponge Galleries Sponges Source: Winchell, Alexander Sketches of Creation (New York, NY: Harper & Brothers, 1870)
