The act of secreting; the process by which material is separated from the blood through the agency of the cells of the various glands and elaborated by the cells into new substances so as to form the various secretions, as the saliva, bile, and other digestive fluids. The process varies in the different glands, and hence are formed the various secretions.
Any substance or fluid secreted, or elaborated and emitted, as the gastric juice.
A substance that is produced by specific structures in the body called glands, for a particular purpose. The substance may be released into the blood, into the spaces inside the hollow tubes in the body (e.g., the digestive tract) or onto the body surface. Examples include the salivary glands secreting saliva into the mouth, glands in the lining of the stomach secreting digestive juices into the stomach and glands lining the breathing tubes secreting mucus.