The lacrimal gland

Located above each of your eyes is a lacrimal gland, also called a tear gland, that secretes a lubricating film onto the surface of the eye to keep it cleaned and nourished. 

Lacrimal glands drain through the tear ducts, and because they secrete fluids directly onto the surface of the eye (and not into the bloodstream), they are considered exocrine glands. 

Anatomy of the lacrimal gland

Each lacrimal gland is shaped like an almond and is located above the outer corner of the eye. The lacrimal artery brings the blood supply, and nerve fibers as well as muscle cells help activate the gland and expel fluid. The nerve fibers can be stimulated by neurotransmitters in the body, and can lead the glands to secrete proteins that protect the eye. 

Each lacrimal gland is made up of two parts: 

Although the size of a normal lacrimal gland can vary from individual to individual, the glands are usually symmetrical and similar in size. The lacrimal gland is approximately 2 centimeters (a little under an inch) long.

READ MORE: Punctum of the eye