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chain of neurons click to hear : chain of neurons

All the interconnected complex nerve cells receiving, communicating and transmitting messages in the form of nerve impulses.
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See chain of neurons in : french | spanish
nucleus myelin sheath axon hillock cell body dendrite sheath of Schwann collateral node of Ranvier terminal arborization synapse axon

nucleus click to hear : nucleus

Organelle containing a cell’s genes and controlling its activities.

myelin sheath click to hear : myelin sheath

Casing of the axon made of a fatty substance (myelin) providing electrical insulation for the neuron and increasing the conduction speed of the nerve impulse.

axon hillock click to hear : axon hillock

Part of the cell body in which the axon lies.

cell body click to hear : cell body

Bulging part of a neuron ensuring maintenance of its structure and function.

dendrite click to hear : dendrite

Each of the short branch extensions of the cell body that receive nerve impulses from surrounding neurons.

sheath of Schwann click to hear : sheath of Schwann

Outer casing of the axon, it surrounds the myelin sheath.

collateral click to hear : collateral

Branch of the axon. An axon can be divided into one or several collaterals.

node of Ranvier click to hear : node of Ranvier

Constriction lacking myelin located at regular intervals along the entire length of the axon; it accelerates the distribution of nerve impulses.

terminal arborization click to hear : terminal arborization

Final branch of the axon storing a chemical substance (neurotransmitter) used to transfer a nerve impulse to the dendrites of the neighboring neuron.

synapse click to hear : synapse

Contact zone between two neurons through which nerve impulses are transmitted.

axon click to hear : axon

Neuron extension communicating nerve impulses to other cells (including nerve and muscle cells). The axons of motor neurons can be more than 1 meter long.