"The Cell Song" provides an overview of the key organelles of animal and plant cells. "Cell Membranes Rap" covers the structure of the phospholipid bilayer; the fluid mosaic model; and the function of the proteins and carbohydrates found in cell membranes. "Osmosis!" covers how water diffuses across membranes, and how cells and organisms respond to hypotonic, hypertonic, and isotonic situations. less