Vintage high school science film that explains the cell as the basic structural and functional unit of all known living organisms. Shows two boys in the country walking along a stream with their dog. Boy holds a frog in his hand. Plant life of a silver of onion viewed through a microscope, showing a cell wall and a nucleus of each structure that makes up an onion. The white spots are called vacuoles. Most of the material inside the cell wall is protoplasm. When a water plant is view through a microscope the protoplasm is in motion. Protoplasm is the life substance of plants.

Shows that plants have leaf cells that are different than the stem cells and different than the root cells, but all made up of protoplasm. Animal cells are also consist of protoplasm. Microscope view of amoeba single cell animal.Various types of animal cells viewed under the microscope.