title: Letter: Area and volume relationship in the crayfish retina.
mesh_terms: D000818:Animals; D003400:Astacoidea / Q000033:anatomy & histology*; D001699:Biometry; D005110:Extracellular Space; D008854:Microscopy, Electron; D012160:Retina / Q000166:cytology*; D013499:Surface Properties