Left ulna and radius, lateral and anterior views

Question 1

The bones of the forearm are the ___ and ___.

Answer 1

ulna

radius

Question 2

The more medial and longer ulna articulates with the trochlea of the humerus at the ___.

Answer 2

trochlear notch

Question 3

The superior edge of the trochlear notch is the ___, which fits into the olecranon fossa of the humerus when the forearm is extended, and the inferior edge of the trochlear notch is the coronoid process, which fits into the coronoid fossa of the humerus when the forearm is flexed.

Answer 3

olecranon process

Question 4

Lateral to the coronoid process, the ___ of the ulna articulates with the head of the radius.

Answer 4

radial notch

Question 5

Distal to the radial head, the __ forms an attachment site for muscles.

Answer 5

radial tuberosity

Question 6

A fibrous sheet called the interosseous membrane connects the radius and ulna along the ___ and serves as a site for muscle attachment.

Answer 6

interosseous margins

Question 7

At their distal ends, the ulna and radius articulate with each other, and the radius articulates with the bones of the wrist. the lateral surface of the ulnar __ articulates with the ulnar __ of the radius.

Answer 7

ulnar head

ulnar notch

Question 8

A ___ extends distally from each of the bones, providing many attachment sites for ligaments and muscles of the wrist.

Answer 8

styloid process