RM
Sponge spicule, SEM
Sponge spicule. Coloured scanning electron micrograph (SEM) of a spicule from a sponge (order Porifera). A sponge is a primitive aquatic organism that filters food from the water. It is a loose aggregation of cells supported by its spicules, needles of a calcium or silicon-rich mineral. The cells in a sponge are not differentiated, unlike those of higher animals. Magnification: x250 at 6x7cm size.
More
Top Categories