title: The ultrastructure of retinula cell endings in the compound eye of the crayfish.
mesh_terms: D000818:Animals; D003400:Astacoidea / Q000033:anatomy & histology*; D004721:Endoplasmic Reticulum / Q000648:ultrastructure; D005123:Eye / Q000294:innervation*; D002479:Inclusion Bodies / Q000648:ultrastructure; D008566:Membranes / Q000648:ultrastructure; D008854:Microscopy, Electron; D008870:Microtubules / Q000648:ultrastructure; D008928:Mitochondria / Q000648:ultrastructure; D010786:Photoreceptor Cells / Q000648:ultrastructure*; D013569:Synapses / Q000648:ultrastructure*