with the electron microscope , the varicose dendrites of 3 separate neurons lightly stained with hrp , morphological features of synapses could be identified at the contact site : clusters of vesicles in the varicose dendrites , intercellular space of about 20 nm separating the apposed membranes , and an intermediate density on the postjunctional membrane .
C0027882
neurons
C0011305
dendrites