<p><strong>Fig. 3.40.</strong> Arrangements of cell clusters (<strong>A</strong>) Cluster of cells in a sphere (<strong>B</strong>) Double-layered bag of cells (phylum Cnidaria) (<strong>C</strong>) Flat cluster of cells (phylum Platyhelminthes)</p>

Fig. 3.40. Arrangements of cell clusters (A) Cluster of cells in a sphere (B) Double-layered bag of cells (phylum Cnidaria) (C) Flat cluster of cells (phylum Platyhelminthes)

Image by Byron Inouye