These cells are numerous in fetal/ neonatal lungs and produce amine (serotonin, 5-HT) as well as a variety of neuropeptides (e.g. bombesin).

• 这些细胞在婴儿和新生肺脏中为数众多，并产生胺类（血清素，5-HT）和多种神经肽（例如铃蟾肽）。