1856
Since noradrenaline and serotonin are detected in pineal nerve vesicles and may coexist in them , the diminution of intravesicular serotonin , by making more storage sites available , probably determines the selective increase of pineal noradrenaline .
 pineal nerve vesicles, intravesicular, sites, pineal
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 pineal nerve vesicles, intravesicular, sites, pineal