The quantitative distribution of 5-hydroxytryptamine in the invertebrates, especially in their nervous systems.
D000818:Animals; D002492:Central Nervous System Depressants; D007448:Invertebrates / Q000737:chemistry*; D009420:Nervous System / Q000737:chemistry*; D012701:Serotonin / Q000737:chemistry*
D002492:Central Nervous System Depressants; D012701:Serotonin
INVERTEBRATES/chemistry; NERVOUS SYSTEM/chemistry; SEROTONIN/chemistry