Examlex
Identify various forms of media that are present today.
Collagen
The main structural protein found in skin and other connective tissues, known for its strength and elasticity.
Melanin
A pigment produced by melanocytes in the skin, hair, and eyes, responsible for coloration and protection against ultraviolet (UV) light damage.
Oxygen
A chemical element (O) essential for most forms of life on Earth, vital for cellular respiration in organisms.
Friction
The resistance encountered when one object is moved in contact with another.
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