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Fig. 8 | Frontiers in Zoology

Fig. 8

From: The central nervous system of Oweniidae (Annelida) and its implications for the structure of the ancestral annelid brain

Fig. 8

TEM, Owenia fusiformis. a: The neurites (ne) of the neuropil of the brain (br) are attached to the basal lamina (ecm) of the epidermis (ep). Somata (so) of the nerve cells are intermingled between the epidermal cells. The neuropil is interwoven with radial arranged glia cells, which contain dense bundles of intermediate filaments (arrows). cu: cuticle. b: The intermediate filaments (if) are attached to the basal lamina of the epidermis. Neurites (ne) are of different size. nc: nucleus; so: somata of nerve cells. c: Neurites contain lucent core (lc) as well as dense core (dc) vesicles. Intermediate filaments are attached to the ecm via hemidesmosoms (hd). Collagen fibres (cg) are well visible in the basal lamina (ecm) of the epidermis

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