It is, however, fair to state that his system was not built entirely upon these muscular variations, but rather upon a more laborious combination of anatomical characters, which were so selected that they presumably could not stand in direct correlation with each other, notably the oil-gland, caeca, carotids, nasal bones and above all, the muscles of the thigh.
The leaves are usually articulated at the base, spreading, sharp-pointed and needle-like in form, destitute of oil-glands, and arranged in alternating whorls of three; but in some the leaves are minute and scale-like, closely adhering to the branches, the apex only being free, and furnished with an oil-gland on the back.
In poultry, there is an oil gland located dorsally to the stumpy tail of the bird.
A sty, or external hordeolum, is a common childhood infection of an oil gland on the surface of the upper or lower eyelids at the base of the eyelash.
If the oil gland is blocked and inflammation spreads beyond the eyelid, the condition can interfere with vision.
Bacteria may live on the eyelids or eyelash hair follicles themselves and begin to grow when the oil gland of a hair follicle becomes blocked.
It also opens the blocked oil gland and helps remove pus.
Sty-An external hordeolum caused by an infection of an oil gland on the eyelid.
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