title: THE R OLE OF NEUROHUMOURS IN EARLY EMBRYOGENESIS. I. SEROTONIN CONTENT OF DEVELOPING EMBRYOS OF SEA URCHIN AND LOACH.
mesh_terms: D000818:Animals; D001669:Biochemical Phenomena; D001671:Biochemistry; D003531:Cypriniformes; D004447:Echinodermata; D004622:Embryo, Mammalian; D004625:Embryo, Nonmammalian; D004626:Embryology; D047108:Embryonic Development; D005399:Fishes; D018377:Neurotransmitter Agents; D012106:Research; D012617:Sea Urchins; D012701:Serotonin
chemical_list: D018377:Neurotransmitter Agents; D012701:Serotonin
keywords: BIOCHEMISTRY; ECHINODERMATA; EMBRYO; EMBRYOLOGY; EXPERIMENTAL LAB STUDY; FISHES; SEROTONIN