Neuron is that cell which indicates by diagram number 5 because the shape is just like the cell of neuron.
Neurons are the fundamental units of the nervous system. These neuron cells are responsible for receiving sensory messages from the external environment and send to nervous system and brain. The brain and nervous system sending commands to the muscles through motor neurons. This neuron cell is different from other types of cell so we can say that the diagram 5 represents neuron cell.
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