Cephalic Index, basic measure of the shape of the skull, used by scientists of the 19th and early 20th centuries in classifying humans. Devised by Swedish anatomist Anders Retzius in the 1840s, the cephalic (or cranial) index expresses the width of the skull as a percentage of the length from front to back. Craniologists distinguished three basic classifications of skulls based on the cephalic index: dolichocephalic (long skulls), with widths of less than 75 percent of the length; mesocephalic (medium skulls), with indexes of 75 to 80; and brachycephalic (broad skulls), with indexes of more than 80 percent.
Online Encyclopedia Blog For Kid's Research In Sciences, Health, Environment and Technology
Showing posts with label Cephalic Index. Show all posts
Showing posts with label Cephalic Index. Show all posts
Subscribe to:
Posts (Atom)
Popular Posts
-
Cellular Respiration, process in which cells produce the energy they need to survive. In cellular respiration, cells use oxygen to break d...
-
Sense Organs, in humans and other animals, faculties by which outside information is received for evaluation and response. This is accompli...
-
. Respiratory System, in anatomy and physiology, organs that deliver oxygen to the circulatory system for transport to all body cells. Oxyge...
-
Reproductive System, term applied to the group of plant or animal organs that are necessary for or that are accessory to the reproductive pr...
-
Hypothalamus, part of the brain, important in regulating the internal activities of the body. Although the hypothalamus constitutes less th...