It is called the _tear gland_.

The gland usually makes just enough tears to keep the eye moist.

There are times when it makes more than enough, as when something gets into the eye, or when we suffer pain or feel unhappy.

Then the tears are carried off by means of a little tube which runs down into the nose from the inner corner of the eye.
When the tears are formed so fast that they cannot all get away through this tube, they pass over the edge of the lower eyelid and flow down the cheek.
~19.

Muscles of the Eyes.~--By means of little muscles which are fastened to the eyeball, we are able to turn the eye in almost every direction.
~20.