Job Growth, Salary, and Related Fields. Careers in environmental science are expected to grow more rapidly in the coming years. This is due to increasing concern by governments, businesses and individuals over the environment and how to prevent environmental disasters.
Report Abuse. Answer: Mucus ----------- Stomach is protected against gastric juice by gastric-mucosal barrier. The barrier consists of three protective components: * a compact epithelial cell lining Cells in the epithelium of the stomach are bound by tight junctions that repel harsh fluids that may injure the stomach lining.
In some regions, the circular layer of smooth muscle enlarges to form sphincters, circular muscles that control the opening and closing of the lumen (such as between the stomach and small intestine). The serosa is a serous membrane that covers the muscularis externa of the digestive tract in the peritoneal cavity.