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.
Histology: The study of the form of structures seen under the microscope (light, electron, infrared ). Also called microscopic anatomy, as opposed to gross anatomy which involves structures that can be observed with the naked eye. The word anatomy comes from the Greek ana- meaning up or through + tome meaning a cutting. Anatomy was once a cutting up because the structure of the body was originally learned through dissecting it. The word histology came from the Greek histo- meaning tissue + logos, treatise. Medically reviewed by Martin Zipser, MD; Board Certified: Surgery.