Figure 21From: Invertebrate neurophylogeny: suggested terms and definitions for a neuroanatomical glossaryCross section through the head of the chaetognath Ferrosagitta hispida. The somata of the brain are arranged in a cell cortex surrounding the neuropil. Abbreviations: cco = cell cortex; ne = neuropil. Original: A. Sombke, G.L. Shinn, C.H.G. Müller, S. Harzsch.Back to article page