title: The hypothalamic-hypophyseal system and its evolutionary aspects in Scyliorhinus caniculus.
abstract: The peptidergic nature of most of the fibres of the neurosecretory system of Scyliorhinus caniculus has been demonstrated with the oxidation method of Naumann and Sterba (1976). Some of the fibres of this peptidergic system terminate on capillaries in the hypothalamic floor, some on neurointermediate cells. The evolutionary aspects of these observations are discussed.
mesh_terms: D000818:Animals; D005075:Biological Evolution; D002196:Capillaries / Q000294:innervation; D004284:Dogfish / Q000033:anatomy & histology*; D007031:Hypothalamus / Q000648:ultrastructure*; D009412:Nerve Fibers / Q000648:ultrastructure*; D009434:Neural Pathways; D009481:Neurophysins / Q000032:analysis; D009490:Neurosecretory Systems / Q000648:ultrastructure; D010455:Peptides / Q000502:physiology; D010902:Pituitary Gland / Q000294:innervation*; D011301:Preoptic Area / Q000648:ultrastructure*; D012754:Sharks / Q000033:anatomy & histology*
chemical_list: D009481:Neurophysins; D010455:Peptides