What is the difference between dendrite, ganglion, synapse?

Anatomy of neuron. All these are anatomy (and physiology) of neuron or nerve cell. 'dendrite' is branched projections of neuron which receives electrical signals, when a group of neurons are clumped together the site is called 'ganglion', and the ' synapse' is the junction of neuron that communicates with the target cell (or other neuron) by releasing a chemical transmitter to activate the other cell.
Nerve parts. A dendrite is a delicate branch of a single nerve cell, the part that generally receives signals from other nerve cells. It often has multiple branches and can look in micrographs like a tree. A synapse is the microscopic connection between nerves; this is where chemicals are released and received to send messages between nerve cells. A ganglion is a collection of multiple nerve cells.
Neuroanatomy. These are all neuro-anatomy terms nerve cells are composed simply of dendrites, cell body and axons. Synapses are theorists of communication between nerve axons and thee next cell which can be another nerve, muscle, or other end organ. Ganglions are generally central points of groups of nerves just prior to exiting/returning from the peripheral to the central nervous system.