Each of these substances is produced by exocrine or endocrine cells found in the mucosa. 1  The main exocrine product of the stomach is gastric juice â a mixture of mucus, hydrochloric acid, and digestive enzymes. 2  Gastric juice is mixed with food in the stomach to promote digestion.
Industry is the production of goods or related services within an economy. The major source of revenue of a group or company is the indicator of its relevant industry. When a large group has multiple sources of revenue generation, it is considered to be working in different industries.
For other uses, see Economy (disambiguation). An economy (From Greek Î¿Î¯ÎºÎ¿Ï â household and Î½ÄÎ¼oÎ¼Î±Î¹ â manage) is an area of the production, distribution, or trade, and consumption of goods and services by different agents in a given geographical location.