It depends on what you mean by 'main'.
The AXON is the part which CONVEYS the neural impulse, which could be thought of as the main FUNCTION of the neuron.
But the DENDRITES are the parts which assess whether the neuron has been stimulated enough to fire the axon, which is another fundamental function of some neurons.
And the BODY (soma) of the neuron is very much a 'main' part of the neuron, because without it the neuron would die.
soma (cell body)
Axon, nucleus, and dendrite
Axon, nucleus, and dendrite
The cell body is the main part of the neuron. It maintains the health of the neuron.
The cell body, called the SOMA, is the main part of the neuron. It is the main metabolic center or region of the neuron. The neuron has 3 parts: DENDRITES (inputs), SOMA (cell body), and AXON (output). The axon is the part which FIRES when sufficient inputs reach it at the axon hillock.
The Synaptic signals from other neurons are received by the neuron's soma and dendrites. Synapse's happens when contact is made by one neuron's axon and is received by another neuron's dendrite and soma. The synaptic signaling procedure is vital to positive neuron function.
synaptic terminal
The axon, an elongated portion of the neuron, carries impulses to the muscles.
Motor Neuron
dendrite
Sensory nerve fibers carry message to brain. A part of neuron or or single neuron does not carry this message to the brain.
The axon is the part of the neuron that can carry information for long distances.
Soma