• All organisms are made up of one or more cells.
• The green particles of plant cells are able to bind the sun's energy.
• Plant cells have a cell wall and a vacuole, which are missing from the animal cell.
• The cell membrane separates the cells from extracellular environment.
• Organelles are located in the cytoplasm within the cell membrane.
• The cell membrane protects the cell and is able to select the substances entering and leaving the cell.
• The most important cellular organ is the nucleus, which controls the cell's function.