in the spleen , immunoreactive profiles showing neuropeptide y-like , met-enkephalin-like , cholecystokinin-8 ( cck ) -like , and neurotensin-like immunoreactivity are present along the central artery of the white pulp and its smaller branches , with only sparse fibers of most of these peptides entering the parenchyma .
C0037993
spleen
C0229686
white pulp