Student Project Figures Figure 32 Cross-section of P. utriculus tissue. Slide was stained using Masson's Trichrome. A; shows a region rich in keratin or fiber (potentially chitin from the siphonophore). B; blue regions reveal the presence of collagen present in the muscle fibers (indicative of contractibility of tentacles). C; polyp resembling a mitochondrion. Scale bar = 100 um. Figure 30 Figure 31 Figure 32 Figure 33 Figure 34