| 1 | The blind have a keen touch. | |
| 2 | Blind people rely a lot on touch. | |
| 3 | One problem: the arm and hand have no sense of touch. | |
| 4 | I am so sensitive to touch that a tickle hurts me. | |
| 5 | These cells detect light and touch, and then pass this information on to muscle cells. |
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