It also contains the nucleolus, a smaller body which aids in the synthesis of protein. It provides a transport system between cell parts and a surface on which reactions may take place. Ribosomes are small bodies which may be found on the surface of the endoplasmic reticulum or suspended free of other organelles in the cytoplasm. They are the site of protein synthesis. Here food is oxidized and energy is produced for use in various cellular activities.
Vacuoles are storage bodies for water, minerals, etc. and can be quite large in plant cells.
In single-cell organisms, vacuoles function in digestion and waste elimination. Golgi bodies function in the production of various secretions of the cell. The function of Golgi bodies is not entirely understood. Lysosomes contain digestive enzymes. They can be released into the cytoplasm when the lysosomes burst open.