Answer :
The net movement of molecules from a region where their initial concentration is higher to a region where their initial concentration is lower is called Diffusion.
Diffusion- A material diffuses when it moves from a region of high concentration to one with a lower concentration. When particles in gases and liquids randomly collide and disperse, diffusion takes place. For living organisms, diffusion is a crucial mechanism because it governs how molecules enter and exit cells.
Cell- The fundamental units of all living organisms are cells. There are many billions of cells in a human body. They provide the body structure, absorb nutrients from meals, turn those food into energy, and perform certain tasks.
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