Washington (CNN)Donald Trump on Sunday repeatedly slammed his chief presidential rival Sen. Ted Cruz as a total liar as the Texas senator and his allies have claimed in the final stretch to the Iowa caucuses that Trump favors government-run, universal health care.
How is the skin, the largest organ in the body, constructed? The skin has two layers: the upper layer is the epidermis, and the lower layer is the dermis. Below the dermis is the hypodermis, or subcutaneous layer, composed of fat or other connective tissue. The epidermis itself is an epithelium made up of sublayers.The outermost portion consists of many layers of flat, dead, dry epithelial cells called keratinocytes. Clearly this barrier of dead cells needs no blood supply. The waxy surface coating of these cells allows the skin to be waterproof and dry.he epidermis itself is an epithelium made up of sublayers. The outermost portion consists of many layers of flat, dead, dry epithelial cells called keratinocytes. Clearly this barrier of dead cells needs no blood supply. The waxy surface coating of these cells allows the skin to be waterproof and dry.
1 Epithelial cells form the thin layer of cells known as the endothelium, which is continuous with the inner tissue lining of organs such as the brain, lungs, skin, and heart. 2  The free surface of epithelial tissue is usually exposed to fluid or the air, while the bottom surface is attached to a basement membrane. For example, the skin is composed of a layer of epithelial tissue (epidermis) that is supported by a layer of connective tissue. 2  It protects the internal structures of the body from damage and dehydration.