Types of eye twitching. Minor eyelid twitch also can be caused by irritation of the surface of the eye ( cornea) or the membranes lining the eyelids (conjunctiva). Sometimes the cause of minor eyelid twitch cannot be identified. In almost all cases it is painless and harmless.
Roots are not simply smooth, long structures. In fact, they typically have tiny hairs that cover most of the roots' length. These hairs absorb water and soluble nutrients for plant success. However, some critical nutrients, like phosphorus, are not readily absorbed by plant root hairs. Soil micro-organisms, such as earthworms, consume the surrounding elements and expel castings rich in soluble elements.
Roots anchor the plant in the soil. Roots absorb water and mineral salts from the soil through their root hairs. Roots may store food. (carrots, turnips, radishes). Roots form a passageway for water and dissolved substances from the root into the stem and also for foods from the stem down into the root.