Investors may want to keep an eye on uranium stocks as Japan restarts nuclear reactors, giving the metal a well-needed boost. Spot prices jumped 5 percent over the weekend following news on Friday that two nuclear reactors in the southern Japanese prefecture of Kagoshima will be restarted next year.nvestors may want to keep an eye on uranium stocks as Japan restarts nuclear reactors, giving the metal a well-needed boost. Spot prices jumped 5 percent over the weekend following news on Friday that two nuclear reactors in the southern Japanese prefecture of Kagoshima will be restarted next year.
Structure of the Digestive Tract Wall The digestive tract, from the esophagus to the anus, is characterized by a wall with four layers, or tunics. The layers are discussed below, from the inside lining of the tract to the outside lining: The mucosa is a mucous membrane that lines the inside of the digestive tract from mouth to anus. Depending on the section of the digestive tract, it protects the digestive tract wall, secretes substances, and absorbs the end products of digestion. It is composed of three layers: The epithelium is the innermost layer of the mucosa.
1) Epithelial Tissue. Epithelial tissue forms the covering or lining of free body surfaces, both internal and external. For example, the outer layer of the skin is formed from epithelial tissue as are the inner linings of the digestive tract and blood vessels.As a group, epithelial tissues perform a variety of functions, including protection, absorption, excretion, secretion and lubrication.I ANIMAL TISSUES. In animals, organs are composed of varying combinations of four basic tissue types -- epithelial tissue, connective tissue, muscle tissue and nervous tissue. Each of these tissues has distinctive structural features and specific functions which are again combined to produce functioning organs.