Cell, The: Structural Unit of Life Main & end titles missing

Main & end titles missing. Teenage boys using microscope in high school science laboratory - look at piece of onion skin. CU cells of onion seen thru lens - stained w/ iodine dye. 20:34:52 Diagram of cell structure. 20:35:12 Boys examine protoplasm of common water plant through microscope - moving particles. 20:36:23 Cells of snapdragon leaf examined - root of plant through lens. CU single-cell amoeba; protoplasm capturing food, growing & dividing. 20:39:38 Boys holding frog; skin of frog shown through microscope; vars animal muscle cells shown. Blood cells. VO recaps key features of cells discussed in film. Ends abruptly. Science - Biology; 1940s; Living Organisms; NOTE: One continuous minute sold at per reel rate.