Secretes

The pineal gland secretes melatonin.

Most structures that we call "coral" are, in fact, made up of hundreds to thousands of tiny coral creatures called polyps. Each soft-bodied polyp—most no thicker than a nickel—secretes a hard outer skeleton of limestone (calcium carbonate) that attaches either to rock or the dead skeletons of other polyps.

The pancreas secretes enzymes and hormones.

The pump developed by researchers is a double pump — in addition to insulin, it automatically secretes glucagon, a hormone that taps glucose reserves in the liver, raising blood sugar levels when they get too low, a condition called hypoglycemia.

[…] As a balbal, he preys particularly on sick people because their spirits are most vulnerable at that time. He secretes himself under the house, directly beneath the patient. He particularly likes to feed on human liver, which he attacks invisibly; or, also unseen, he sucks the blood of the patient. […]