Fig. 10

Intraepidermal elements of CNS in the trunk of female Osedax priapus. a, b, d-f TEM of ultrathin transverse sections. c Light micrograph of transverse histological section. a Dorsal fragment of section (c) showing the oviduct with dorsal neurites. b Lateral fragment of section (c) showing ciliary band and underlined dorsolateral neurites. c Transverse histological section of the trunk, frames indicate the fragments a, b, d-f with TEM views. d-f Neural elements of the epidermis of the ventral side: d Submerged ciliary cell at the middle of the ventral side. e Right bundle of the ventral cord and neural process next to it. f Overview of the ventral neural elements. Abbreviations: c – cuticle, cb – ciliary band, cnc – ciliary neural cell, dn – dorsal nerve, dln – dorso-lateral nerve bundle, dvm – dorso-venral mesenterium, ep – epidermal cells, ovd – oviduct, mp – muscle processes surrounded by the membrane and stretching at the bases of epidermal cells, mpn – cellular process with actin fibers and cytoplasm with granules, nc – neural cells, ol – epidermal cells lining the oviduct, om – microvilli projecting to the oviduct lumen, tcm – trunk circular muscles, tlm – trunk longitudinal muscles, vc – ventral cord