Ultrastructural features of and extracellular ionic pathways in the Limulus ommatidium.
D000818:Animals; D003386:Brachyura / Q000033:anatomy & histology*; D005110:Extracellular Space; D007477:Ions; D010786:Photoreceptor Cells / Q000166:cytology* / Q000502:physiology
D007477:Ions