201. Osmosis (19:47)
- Date:
- 1948
- Summary:
- Teaching Film Custodians release of a Motion Picture Association of America short film. A high school student, who is having difficulty understanding the textbook explanation of osmosis, discusses the problem with his detective friend. They go to a police laboratory. There a technician demonstrates osmotic pressure and clarifies the student's questions. This film addresses the following concepts: 1) Cells receive air and liquid through cell walls and tissues; 2) cells release waste products as liquids and gasses through the tissues; 3) diffusion of molecules of salt with molecules of water; diffusion through a membrane, or osmosis.