1. in man, the part of the body from the neck to the bottom of the spine. 2. in animals, the upper part of the body. of or at the back. the back door. 1. to, or at, the place or person from which a person or thing came.
secrete definition: Secrete is defined as to hide, or to produce and release a liquid. (verb) An example of secrete is to put the house key in a secret location. An example of secrete is for the body to produce sweat. ...
In the human digestive system, the main sites of digestion are the oral cavity, the stomach, and the small intestine. Digestive enzymes are secreted by different exocrine glands including: 1  Salivary glands.2  Secretory cells in the stomach.3  Secretory cells in the pancreas. 4  Secretory glands in the small intestine.igestive enzymes are secreted by different exocrine glands including: 1  Salivary glands. 2  Secretory cells in the stomach. 3  Secretory cells in the pancreas. 4  Secretory glands in the small intestine.