The brain consists of neurons and glial cells.
Glial cells are astrocytes, oligodendroglia, ependymal cells, and microglia.
This is a wrong impression. These processes fit together tightly, leaving a minimal extracellular space. The dendritic tree is the receptive part of the neuron. The axon conveys the signal to its target. The cell body contains the nucleus and most organelles that perform the synthetic and catabolic activities that keep the neuron and all its parts alive and functioning.