The cell body contains the metabolic machinery necessary to keep a neuron alive and functioning properly.
In biology, it is the smallest unit that can live on its own and from which all living things and body tissues are built. Cells are composed of three main parts: membrane, nucleus and cytoplasm. The cell membrane surrounds the cell and controls substances entering and leaving the cell.
The cell is defined as the smallest basic unit of life involved in all life processes. Cells are the structural, functional and biological units of all living things. Cells can replicate themselves. They are therefore considered the building blocks of life.
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