“Invisible Forces: Electricity” (Spanish: "Fuerzas Invisibles: Electricidad") is a Spanish-language life science video about cell membranes, not electricity. Using soap bubbles as a model, it explains phospholipids, the cell membrane, selectively permeable membranes, and how cells regulate movement of water and nutrients. Key biology concepts include osmosis, solutes, diffusion, facilitated diffusion, active transport, ATP, endocytosis, phagocytosis, pinocytosis, receptor proteins, ions, and electrical impulses in nerve and muscle cells. The video also compares animal and plant cells, introduces protozoans such as amoebas and paramecia, and connects membrane function to red blood cells, kidneys, roots, and immunity. This curriculum-aligned overview supports middle school to early high school biology, cell structure and function, transport across membranes, and introductory physiology. Part of the "Invisible Forces" (Spanish: "Fuerzas Invisibles") series.