S-Type Axon, En Passant
Varicosities along axon's length in which clouds of spherical synaptic vesicles are clustered. Mitochondrion (M)
F-Type Axon, En Passant
Adjacent varicosities contain predominantly flat or elongate synaptic vesicles.
P-Type Axon, En Passant
Varicosities contain pleiomorphic vesicles with or without dense cores.
S/C-Type Axon, En Passant
Varicosities contain co-localized spherical and dense core vesicles.
F/C-Type Axon, En Passant
Varicosities contain co-localized elongate and dense core vesicles.
P/T-Type Axon, En Passant
Varicosities contain pleiomorphic vesicles and many intracytoplasmic tubules.