- Cell membrane: The thin, flexible boundary that surrounds the cell.

- Cytoplasm: The gel-like substance that fills the cell and contains all the organelles.

- Nucleus: The spherical or oval structure that contains the cell's genetic material.

- Nucleolus: The dark, spherical structure within the nucleus that is involved in ribosome production.

- Chromatin: The threadlike material in the nucleus that consists of DNA.

- Ribosomes: Small, round organelles that are involved in protein synthesis.

- Endoplasmic reticulum: A network of flattened, interconnected sacs involved in the transport of materials within the cell.

- Golgi apparatus: A complex of flattened membranes that modifies and packages proteins for secretion or transport within the cell.

- Lysosomes: Small, membrane-bound organelles that contain digestive enzymes to break down waste materials and foreign substances.

- Mitochondria: Bean-shaped organelles that are responsible for the energy production of the cell.

- Chloroplasts: Green organelles that capture sunlight and convert it into chemical energy in plant cells.

- Vacuoles: Membrane-bound sacs that store materials such as water, salts, proteins, and carbohydrates.

Remember that standard optical microscopes have a resolution limit, which means that they cannot resolve structures smaller than about 0.2 micrometers (200 nanometers). For observing smaller cellular components and finer details, advanced microscopy techniques such as electron microscopy or super-resolution microscopy may be required.