A cell is the basic unit of living organisms (both plants and animals)
that is capable of reproducing itself exactly. That is, there are
components within cells (organelles), but they do not reproduce themselves
independently of the cell(s) of which they are a part.
A centrosome (sometimes alternatively referred to as
a "centrosphere") is an area or region of clear cytoplasm located next
to the nucleus in non-dividing cells. Centrosomes contain centrioles - which are responsible for cell-division.
See the Revision page about Cell
Structure for further information including a diagram of the
structure of a basic cell including its centrosomes and all other