Radius (bone) ulna (center of the circle) to the edge of the radius (the circle). The ulna acts as the center point to the circle because when the arm is rotated the ulna does not move. In four-legged animals, the radius is the main load-bearing bone of the lower forelimb. Its structure is similar in most terrestrial tetrapods, but it may be fused with the ulna in some mammals (such as horses) and reduced or modified in animals with flippers or vestigial forelimbs. Radius (bone) The radius or radial bone is one of the two large bones of the forearm, the other
Blood is thicker than water Blood is thicker than water Blood is thicker than water is an ancient yet famous English proverb that means family relations and bonds are always deeper and goes long-lasting than any other relationships. The term is pretty old and used in its various forms. Similar oldest record can be traced back in the 12th century in German. In modern society, definition the term is same and unmodified. The equivalent proverb in German (originally: "Blut ist dicker als Wasser"), first appeared in a different form in the medieval German beast epic "Reinhart Fuchs" (c. 1180; English: "Reynard the Fox") by Heinrich