The
cytoplasm comprises
cytosol (the gel-like substance enclosed within the cell membrane) and the
organelles – the
cell's internal sub-structures. All of the contents of the cells of
prokaryote organisms (such as
bacteria, which lack a
cell nucleus) are contained within the cytoplasm. Within the cells of
eukaryote organisms the contents of the
cell nucleus are separated from the cytoplasm, and are then called the
nucleoplasm. The cytoplasm is about 80% water and usually colorless.