Some cell parts are not easily visible using a compound light microscope. The ribosomes, which are sites of protein synthesis are tiny and found in the cytoplasm and along the endoplasmic reticulum tubules. The endoplasmic reticulum, or E.R. are also not visible with a light microscope. These are for translation and the folding of proteins into a functional three dimensional shape, as well as expression of lipids.The Golgi apparatus is for packaging and modifying proteins for transport inside and out of the cell. Mitochondria, the organelles for cellular respiration are hard to see with a light microscope unless a special stain is added to make them visible.
*Three part of the cells:
*1.an outer cell wall or plasma membrane - surround the cells,separating its content from the surroundings and controlling what enters and leaves the cell,It composed of two main molecules fats(phospholipids) and proteins.
*2.an inner region or the cytoplasm - it consist of a clear jelly-like fluid called cytosol or intracellular fluid, cell inclusions, organelles, and microfilaments or microtubules.
*3.nucleus - is the largest structure in a cell.It is a spherical or oval body that contain the chromosome.