Voorbeelden van ulna

• From left to right, the left tibia, the right femur, the left humerus, the left ulna and the left radius.

• A subadult left ulna measures 185 mm in length, suggesting an adolescent of 9 to 15 years.

• The ulna and radius are connected at both ends.

• Long bones (femur, tibia and ulna) were cleaned from their flesh and whole bone powder was obtained by crushing them.

• The ulna is a dorso-ventrally flattened bone with a long groove on the proximal part of the ventral side for contact with the radius.

• However, their hands were together in front of them, crossing one above the other at the level of the distal radii and ulnae, carpals, or metacarpals.

• After this, the freed distal end is reattached to the proximal ulna with the formerly mentioned plate.

• It is the proximal extremity of the ulna which is articulated with the humerus and constituting a part of the elbow articulation.

• The ulna is slender and cylinder-shaped with a length of 70% of that of the humerus.

• At its lower end, the humerus has a larger facet contacting the radius than contacting the ulna.

• The best examples of ginglymus are the interphalangeal joints and the joint between the humerus and ulna.

• Proximally, the ulna has a bony process, the olecranon process, a hook-like structure that fits into the olecranon fossa of the humerus.

• The radius and ulna (forearm bones) locked together so that there was no possibility of pronation or supination (twisting) as in human forearms.

• The forearm contains two long bones, the radius and the ulna, forming the radioulnar joint.

• The humerus joins the radius and ulna (forearm) to form the elbow.