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 the death of bone tissue due to a lack of blood supply. Also called osteonecrosis, avascular necrosis can lead to tiny breaks in the bone and the bone's eventual collapse. The blood flow to a section of bone can be interrupted if the bone is fractured or the joint becomes dislocated.Avascular necrosis is also associated with long-term use of high-dose steroid medications and excessive alcohol intake. Anyone can be affected by avascular necrosis.he blood flow to a section of bone can be interrupted if the bone is fractured or the joint becomes dislocated. Avascular necrosis is also associated with long-term use of high-dose steroid medications and excessive alcohol intake. Anyone can be affected by avascular necrosis.