A roast beef sandwich on white bread is a deli classic. Usually made with beef from the round, or hind leg, section of the cow -- roast beef is one of the leaner cuts of beef with fewer calories than fattier sections. Video of the Day
corpus callosum. a great band of deeply situated transverse white fibers uniting the two halves of the cerebrum in humans and other mammals.
Structure[edit] The posterior (back) portion of the corpus callosum is called the splenium; the anterior (front) is called the genu (or knee); between the two is the truncus, or body, of the corpus callosum. The part between the body and the splenium is often markedly narrowed and thus referred to as the isthmus. The rostrum is the part of the corpus callosum that projects posteriorly and inferiorly from the anteriormost genu, as can be seen on the sagittal image of the brain displayed on the right.