An introduction to the XML Document Type Definition. What XML building blocks are defined in a DTD. How to define the elements of an XML document using DTD. How to define the legal attributes of XML elements using DTD. How to define XML entities using DTD. How to test for DTD errors while loading XML documents. Some DTD examples.
19 Jul, 2012 what is 0. The Basement membrane is a layer of fiber that is located under epithelium or endothelium. The epithelium is the tissue that lines the surfaces and cavities of organs, whereas the endothelium lines the inside of blood vessels.
Basement membranes attach layers of tissues in the body. Learn how the basement membrane helps our skin counteract the effects of gravity and explore its various other functions in this lesson.our skin has three layers. The outer layer, called the epidermis, is composed of epithelial cells. This is the part of the skin that's visible to the eye and probably peels off in sheets if you've had too much fun in the sun. The middle layer is the dermis and is composed of connective tissue.