a domain specific word like tectonic has both literal and figurative meanings but for the most part the use of the word is found in geology and physics as you may recall earthquakes and tsunamis can be caused by tectonic shifts in which two landmasses collide
Epidermis: It is the superficial avascular layer of stratified squamous epithelium, It is ectodermal in origin and gives rise to the appendages of the skin, namely hair, nails, sweat glands and sebaceous glands.Structurally the epidermis is made up of a superficial cornified zone and a deep germinative zone.ermis: Dermis or corium is the deep, vascular layer of the skin derived from mesoderm. It is made up of connective tissue mixed with blood vessels, lymphatics and nerves. The connective tissue is arranged into a superficial papillary layer and a deep reticular layer.
Avascular necrosis is bone death that occurs when the blood supply to the bones is decreased or stopped.Without an adequate blood supply, the bone breaks down and dies and collapses. If the bone affected is near a joint, the joint may also collapse.Although any bone can be affected, avascular necrosis most often affects ends of the long bones, such as the upper leg bone at the hip.Avascular necrosis is also called osteonecrosis, aseptic necrosis, or ischemic bone necrosis.f the bone affected is near a joint, the joint may also collapse. Although any bone can be affected, avascular necrosis most often affects ends of the long bones, such as the upper leg bone at the hip. Avascular necrosis is also called osteonecrosis, aseptic necrosis, or ischemic bone necrosis.