Student Project Figures Figure 5 The internal structures of A. sydneiensis. (A) the incurrent (buccal) siphon. (B) the pharyngeal basket within the atrium. (C) the excurrent (atrial) siphon. (D) the deeply curved gut loop. (E) stomach, showing folding. (F) Gravid ovaries, within the gut loop.  Figure 4 Figure 5 Figure 6 Figure 7 Figure 8