Examlex
The atrioventricular (AV) node is located in the
Saturation
The intensity or purity of a color, indicating the absence of white light.
Iris
The colored part of the eye surrounding the pupil, responsible for controlling the diameter and size of the pupil and thus the amount of light reaching the retina.
Pupil
The opening in the center of the iris of the eye, which regulates the amount of light that enters the eye.
Retina
A thin layer of tissue at the back of the eye that contains cells sensitive to light, which trigger nerve impulses that pass via the optic nerve to the brain, where a visual image is formed.
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