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:
“For the first fourteen years for a rod they do whine,
For the next as a pearl in the world they do shine,
For the next trim beauty beginneth to swerve,
For the next matrons or drudges they serve,
For the next doth crave a staff for a stay,
For the next a bier to fetch them away.”
—Thomas Tusser (c. 1520–1580)
“each in the cell of himself is almost convinced of his freedom,”
—W.H. (Wystan Hugh)