The ulna is a bone of the arm, and the tibia is a bone of the leg. They have no articulations.
At the distal end: the carpels in the hand at the head of the ulna and the radius at the ulna notch of radius. At the proximal end: the trochlea of the humerus at the trochlear notch and coronoid process of the ulna and the head of the radius at the radial notch of the ulna.
The trochlear notch is located on the ulna bone, which is one of the two bones in the forearm. It is found at the proximal end of the ulna, forming a part of the elbow joint where it articulates with the trochlea of the humerus.
To you mean the joint itself? The elbow, AKA the proximal-distal axis of the humerus and ulna, respectively.Or just the distal epiphysis of the humerus (the rounded head of the bone which is farther fromthe arm's point of attachment to the torso)
The ulna has the head at the distal end. Usually the head of a bone is located at the proximal end. The ulna has a large process called the olecranon process that people call their 'elbow'.
The ligament you are referring to is the annular ligament, which encircles the head of the radius and attaches it firmly to the ulna. This ligament allows for proper rotation of the radius around the ulna during forearm movements.
The trochlear notch is a depression on the proximal end of the ulna bone that articulates with the trochlea of the humerus. This forms the hinge joint of the elbow, allowing for flexion and extension of the forearm.
No, the patella is not proximal to the ulna. The patella is the kneecap, and is on the lower extremity. The ulna is the smaller of the forearm bones. Since the structures are on different limbs, you can't use the directionals proximal and distal. However, the patella is inferior and medial to the ulna.
The distal end of the humerus articulates with the two bones of the forearm, the radius and the ulna. Noteworthy features on its distal and are the lateral and medial epicondyles (one of which is your elbow) as well as the trochlea and capitulum(both of these features forming the "pulley" shape found at the end of the humerus.
The trochlea is the spool-shaped process of the humerus that articulates with the ulna. The ulna's trochlear notch fits onto the trochlea for stability.
Humerus
femour, tibia, ulna
What the tibia is to the fibula