Examlex
By definition, the addition of oxygen to a substance is called
Receptor Cells
Specialized cells in the body that convert external stimuli into electrical signals for the nervous system to process.
Cones
Retinal receptor cells that are concentrated near the center of the retina and that function in daylight or in well-lit conditions. The cones detect fine detail and give rise to color sensations.
Periphery
The external boundary or surface of an area or object, or those areas that lie beyond the central or main part.
Dilation
The process of expansion or widening in size, often referring to the enlargement of the pupil or blood vessels.
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