Figure 4: Comparison between a biological neuron and artificial neuron. (a) Neuron: The dendrites receive electrical signals through synapse. Soma processes the electrical signal. Axon carries output of the process is to the next neuron through dendrite terminal. The nucleus is the heart of the neuron. (b) The input layer takes input, the hidden layer processes the input and the output layer sends the calculated output (c) Neural networks used for deep learning models have greater number of hidden layers than in a simple artificial neural network, and hence called ‘deep’ learning models.