Student Project Figures Figure 8 Figure 26: A section of a zooid cut perpendicular to the base (posterior) of the animal and stained with H.E. Visible in this section in addition to Figure 1, is the zooid's heart and buccal tentacles that are only found on the incurrent siphon. Scale: 500 µm. Figure 4 Figure 5 Figure 6 Figure 7 Figure 8