Figure 28From: Invertebrate neurophylogeny: suggested terms and definitions for a neuroanatomical glossaryPlexus. A. Intraepidermal plexus of the chaetognath Sagitta setosa. [Acetylated α-tubulin immunohistochemistry.] B. Strong agglomeration of sensory cells around the mouth opening of Hydra attenuata (Hydrozoa). Radially orientated processes are present in the apical half of the hypostome. A weaker innervation is shown in the tentacles and the upper gastric region. [Whole-mount staining showing RF-amide-like immunoreactivity.] A: From [334], creative common license of BMC; B: From [335], with permission of Springer.Back to article page