This is also heterogeneous, i.e. a composite of carbon-poor iron and cementite. Going to very fast cooling (quenching) will result in a single-phase (not composite) material called martensite. Here the carbon doesn't have time to exit the iron, and this martensite phase is very hard, but also normally too brittle.
Epithelial tissue - to cover the inner and outer surfaces of the stomach The stomach is one of the organs that form the digestive system. The stomach contains various tissues, and each tissue is made of a particular type of cell. In order of increasing size and complexity: cells â tissues â organ (the stomach) â organ system (the digestive system)
Epithelial tissue forms lining layers of structures in the body. Examples There is epithelial tissue in the skin. Epithelial tissue forms the inner lining of the stomach, â¦lungs, and blood vessels.   Types of epithelial tissue   There are different types of epithelial tissue, distinguished by the different shapes of their constituent cells: squamous, cuboidal, and columnar.