Rod Cell
Rod cells, or rods, are photoreceptor cells in the retina of the eye that can function in less intense light than can the other type of visual photoreceptor, cone cells. Rods are concentrated at the outer edges of the retina and are used in peripheral vision. On average, there are approximately 125 million rod cells in the human retina. More sensitive than cone cells, rod cells are almost entirely responsible for night vision.
Read more about Rod Cell: Structure and Function, Sensitivity, Response To Light
Famous quotes containing the words rod and/or cell:
“The rod and reproof give wisdom: but a child left to himself bringeth his mother to shame.”
—Bible: Hebrew Proverbs 29:15.
“She that but little patience knew,
From childhood on, had now so much
A grey gull lost its fear and flew
Down to her cell and there alit,
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And from her fingers ate its bit.”
—William Butler Yeats (1865–1939)