The ulnar.
the radius
The ulna and the radius articulate with the distal humerus at the elbow joint. The ulna forms the primary articulation, while the head of the radius articulates with a small depression on the side of the ulna known as the radial notch.
The carpals articulate distally with the ulna. The carpals are also known as the wrist bones.
radius and ulna
radius and ulna
The lower extremity of the radius actually has two bones which it articulates with. The carpal and the ulna.
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 humerus articulates with the radius and ulna at the elbow joint. The trochlea of the humerus articulates with the trochlear notch of the ulna, forming a hinge joint that allows for flexion and extension. The capitulum of the humerus articulates with the head of the radius, allowing for rotation of the forearm.
at the distal end of the radius
head of radius
It depends on how big your head is.
The fulcrum in this case would be your elbow joints. more specifically the trochlea and capitulum on the humerus which articulate with the radius and ulna