![Overview of nematode nervous systems. Key features include a circumoral... | Download Scientific Diagram Overview of nematode nervous systems. Key features include a circumoral... | Download Scientific Diagram](https://www.researchgate.net/profile/William-Schafer-2/publication/309454437/figure/fig1/AS:614296115499010@1523471015043/Overview-of-nematode-nervous-systems-Key-features-include-a-circumoral-brain-or-nerve.png)
Overview of nematode nervous systems. Key features include a circumoral... | Download Scientific Diagram
![Central nervous systems (CNSs) in protostomes, exemplified by annelids.... | Download Scientific Diagram Central nervous systems (CNSs) in protostomes, exemplified by annelids.... | Download Scientific Diagram](https://www.researchgate.net/profile/Claus-Nielsen-4/publication/272517513/figure/fig2/AS:601591216361475@1520441931341/Central-nervous-systems-CNSs-in-protostomes-exemplified-by-annelids-The-upper-two_Q640.jpg)
Central nervous systems (CNSs) in protostomes, exemplified by annelids.... | Download Scientific Diagram
![Outlines of zoology . Fig. ii6.—Anteriorpart of nervous sys-tem in Arenicola.—After Vogt and Yung. c, Cerebral part on dorsalsurface: a.r.^ oesoph-ageal ring ; ^., gullet;v.n.c, ventral nerve-cord ; Ln., lateral nerves;oL, otocyst. Outlines of zoology . Fig. ii6.—Anteriorpart of nervous sys-tem in Arenicola.—After Vogt and Yung. c, Cerebral part on dorsalsurface: a.r.^ oesoph-ageal ring ; ^., gullet;v.n.c, ventral nerve-cord ; Ln., lateral nerves;oL, otocyst.](https://c8.alamy.com/comp/2AJ083G/outlines-of-zoology-fig-ii6anteriorpart-of-nervous-sys-tem-in-arenicolaafter-vogt-and-yung-c-cerebral-part-on-dorsalsurface-ar-oesoph-ageal-ring-gulletvnc-ventral-nerve-cord-ln-lateral-nervesol-otocyst-the-prostomial-lobes-are-diffusely-sensoryand-bear-also-two-ciliated-probably-olfactorypitsthe-nuchal-organs-otherwise-senseorgans-are-represented-only-by-a-pair-of-oto-cyst-sacs-fig-ii6-one-on-each-side-of-thecesophageal-nerve-ring-these-sacs-like-thosewhich-occur-in-many-other-invertebrates-seem-to-have-to-do-rather-withthe-direction-of-the-animals-mov-2AJ083G.jpg)
Outlines of zoology . Fig. ii6.—Anteriorpart of nervous sys-tem in Arenicola.—After Vogt and Yung. c, Cerebral part on dorsalsurface: a.r.^ oesoph-ageal ring ; ^., gullet;v.n.c, ventral nerve-cord ; Ln., lateral nerves;oL, otocyst.
![Structures of head neurons and nerve ring. Clusters of neuronal cell... | Download Scientific Diagram Structures of head neurons and nerve ring. Clusters of neuronal cell... | Download Scientific Diagram](https://www.researchgate.net/profile/William-Schafer-2/publication/309454437/figure/fig2/AS:614296115503106@1523471015069/Structures-of-head-neurons-and-nerve-ring-Clusters-of-neuronal-cell-bodies-ganglia.png)
Structures of head neurons and nerve ring. Clusters of neuronal cell... | Download Scientific Diagram
![From nerve net to nerve ring, nerve cord and brain — evolution of the nervous system | Nature Reviews Neuroscience From nerve net to nerve ring, nerve cord and brain — evolution of the nervous system | Nature Reviews Neuroscience](https://media.springernature.com/lw685/springer-static/image/art%3A10.1038%2Fnrn.2015.15/MediaObjects/41583_2016_Article_BFnrn201515_Fig5_HTML.jpg)
From nerve net to nerve ring, nerve cord and brain — evolution of the nervous system | Nature Reviews Neuroscience
![<p><strong>Fig. 3.24.</strong> Fig. 3.24. (B) Medusa life form Image adapted by Mariana Ruiz Villarreal, Wikimedia Commons <p><strong>Fig. 3.24.</strong> Fig. 3.24. (B) Medusa life form Image adapted by Mariana Ruiz Villarreal, Wikimedia Commons](https://manoa.hawaii.edu/sealearning/sites/default/files/Fig3.24B-Cross_section_jellyfish.png)
<p><strong>Fig. 3.24.</strong> Fig. 3.24. (B) Medusa life form Image adapted by Mariana Ruiz Villarreal, Wikimedia Commons
![From nerve net to nerve ring, nerve cord and brain — evolution of the nervous system | Nature Reviews Neuroscience From nerve net to nerve ring, nerve cord and brain — evolution of the nervous system | Nature Reviews Neuroscience](https://media.springernature.com/lw685/springer-static/image/art%3A10.1038%2Fnrn.2015.15/MediaObjects/41583_2016_Article_BFnrn201515_Fig2_HTML.jpg)
From nerve net to nerve ring, nerve cord and brain — evolution of the nervous system | Nature Reviews Neuroscience
![ill.pC Fig. 13. Reconstruction of nervous system. As the plane of the nerve ring is at about 120° to that of the chain system (see Fig. 11), the reconstruction of the ill.pC Fig. 13. Reconstruction of nervous system. As the plane of the nerve ring is at about 120° to that of the chain system (see Fig. 11), the reconstruction of the](https://l450v.alamy.com/450v/t1hrek/discovery-reports-1940-discovery-reports-discoveryreports19inst-year-1940-nsh2-namdb-nadd-n5hj-nmxi-msh4-nmx2-nmxzs-illpc-fig-13-reconstruction-of-nervous-system-as-the-plane-of-the-nerve-ring-is-at-about-120-to-that-of-the-chain-system-see-fig-11-the-reconstruction-of-the-nerve-ring-was-made-from-one-series-of-sections-and-that-of-the-chain-system-from-another-the-sections-on-which-these-drawings-are-based-are-illustrated-by-photo-graphs-on-plate-xl-figs-1-8-ant21-nerve-loop-ramifying-over-antennal-gland-gai-basal-ganglion-of-antennule-nac-anteri-t1hrek.jpg)