The radius moves around on the ulna by means of a pivot joint.
The ulna must then be cleared, and the triceps divided at its insertion.
The humerus is much longer than with the Yezo Ainu, while the ulna and radius are shorter; the hand is the same length.
The fore-arm or antibrachium consists of two bones, the radius and ulna.
The second segment contains two long bones, the radius and ulna (or arm bones), or the tibia and fibula (or leg bones).
The ulna (fig. 57, 3) is longer, stouter, and slightly curved.
The radius and ulna are nearly equal in size and each consists of a long shaft terminated at either end by an epiphysis.
The radius and ulna are not ankylosed, but are incapable of any rotatory movement.
The secondary quills or those attached to the ulna vary much in number according to the length of the bone.
The clavicle is well developed, and the radius and ulna are never united.
ulna ul·na (ŭl'nə)
n. pl. ul·nas or ul·nae (-nē)
The larger bone of the two bones of the forearm, extending from elbow to wrist on the side opposite the thumb. Also called cubitus, elbow bone.
Plural ulnas or ulnae (ŭl'nē)
The longer of the two bones of the forearm or lower portion of the foreleg. See more at skeleton.