Specialized cells - Different types of cells that perform different functions, Selectively permeable - Allows some substances to cross the cell membrane , while others cannot, Diffusion - The process by which molecules move from an area of higher concentration to the area of lower concentration, Passive transport - Movement of materials across the cell membrane without using the cell's energy, Osmosis - The diffusion of water molecules across a selectively permeable cell membrane , Facilitated diffusion - Proteins in the cell membrane form channels to allow sugars to pass inside the cell,

Transporting materials

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