On the ultrastructure of the synaptic region of visual receptors in certain vertebrates.
D000818:Animals; D001001:Anura; D002415:Cats; D002645:Chickens; D006168:Guinea Pigs; D008394:Marsupialia; D010786:Photoreceptor Cells / Q000166:cytology*; D011817:Rabbits; D012104:Reptiles; D011984:Sensory Receptor Cells; D013569:Synapses; D014785:Vision, Ocular