Many chemical reactions take place in the cytosol. For example, enzymes in the cytosol begin the breakdown of nutrients to provide energy for cellular activities. You can think of the cytoskeleton as the bone and muscle of the cell. Cell inclusions are chemical substances that are produced by specific cells and stored in their cytosol. Glucose is then used by body cells for energy.
FATS are cell inclusions found in fat cells.
Fat can also be broken down to produce energy. It gives skin, hair and eyes their color, and it protects underlying tissues from harmful ultraviolet rays of the sun. All organelles, with the exception of the ribosomes, are surrounded by a phospholipid bilayer membrane, similar to the plasma membrane. The nucleus contains DNA, the hereditary genetic material of the cell. DNA controls the structure and activities of a cell by providing the instructions for protein synthesis.