Cellular Level (the neuron)
The cell is the smallest functional unit of every living organism. The simplest organisms, such as bacteria, have only one cell.
The human nervous system consists of billions
of specialized cells called neurons, which carry and transmit bioelectrical
and biochemical signals. On this site, when we talk about the cellular
level, we are describing the events that take place in these neurons.
To do so, we show how a neuron’s form and
function are intimately related. We also describe the various kinds
of circuits in which neurons are interconnected, ranging from simple
reflex circuits comprising just a few neurons to complex neural
networks comprising several hundred.
The sciences dealing with the cellular level of organization include cell biology and histology.
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