Evidence for Involvement of Wnt Signalling in Body Polarities, Cell Proliferation, and the Neuro-Sensory System in an Adult Ctenophore (original) (raw)
Figure 1
General morphology of the ctenophore Pleurobrachia pileus.
The mouth (mo) and the aboral neuro-sensory complex (nsc) are located respectively at the oral and aboral pole of the single body axis. The eight comb rows (cr) are locomotory structures, each made of regularly repeated swimming paddles or combs. The body is biradially symmetrical notably due to the presence of a single pair of tentacles (tcl), each bearing numerous lateral branchings or tentillae (tt). The tentacle root (tr), enclosed in the tentacle sheath, is responsible for constant regeneration of tentacle tissues. The pharynx (ph) and some canals of the endodermal gastro-vascular system are also visible by transparency. Scale bar: 1 cm.