The portion of the Sonora Desert which lies in the Southwestern United States is the most populated area within the region. Six of the top ten major population centers of the region are found within its borders: Phoenix, Tucson, Mesa, Chandler, Glendale, and Scottsdale, all in Arizona.
Insertion. Insertion. 1. (Science: anatomy) The place of attachment, as of a muscle to the bone which it moves. 2. (Science: genetics) a rare nonreciprocal translocation involving three breaks in which a segment is removed from one chromosome and then inserted into a broken region of a nonhomologous chromosome.
The surgical creation of an artificial opening in a bone, as in the inner ear so as to improve or restore hearing. fenestration. 1 a surgical procedure in which an opening is created to gain access to the cavity within an organ or a bone. 2 an opening created surgically in a bone or organ of the body. 3 (in dentistry) a procedure to expose a root tip of a tooth to permit drainage of exudate.