Cell Membrane - flexible covering that protects the inside of a cell from the environment outside a cell, Cytoplasm - fluid inside a cell that contains salt and other molecules, Semipermeable membrane - allows only certain substances, like nutrients and wastes to enter or leave a cell  , Cell Wall - stiff structure outside the cell membrane that protects a cell from attack by viruses and other harmful organisms, Proteins - a long chain of amino acid molecules, contains carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur, Endoplasmic Reticulum - helps remove harmful substances from a cell, Vacuoles - organelles that store food, water and waste materials, Cellular respiration - series of chemical reactions that convert the energy in food molecules into a usable form of energy called ATP, Chloroplasts - organelles that use light energy and make food - a sugar called glucose - from water and carbon dioxide in a process called photosynthesis, Nucleus - part of a eukaryotic cell that directs cell activities and contains important cellular information stored in DNA,

Cell Structure and Function

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