Appendicular skeleton - pectoral girdle, arms, wrists

Front

What is the appendicular skeleton?

Back

The appendicular skeleton consists of the bones of the limbs and the girdles that attach them to the axial skeleton, including the pectoral girdle, arms, wrists, pelvic girdle, and legs.

Front

What are the main components of the pectoral girdle?

Back

The pectoral girdle is composed of the clavicle (collarbone) and the scapula (shoulder blade).

Front

Which part of the humerus is the most commonly fractured?

Back

The surgical neck of the humerus is the most commonly fractured part.

Front

What is the function of the acromion?

Back

The acromion is a bony process on the scapula that articulates with the clavicle, forming the acromioclavicular joint.

Front

What bone in the forearm is primarily involved in the wrist joint?

Back

The radius is the forearm bone that is a major contributor to the wrist joint.

Front

Which part of the humerus articulates with the ulna?

Back

The trochlea of the humerus articulates with the ulna.

Front

What is the role of the glenoid cavity?

Back

The glenoid cavity is a shallow socket in the scapula that forms the shoulder joint by articulating with the head of the humerus.

Front

What is the significance of the surgical neck of the humerus?

Back

The surgical neck is significant because it is a common site for fractures, especially in older adults.

Front

How does the structure of the scapula contribute to shoulder mobility?

Back

The scapula's flat, triangular shape and its articulation with the humerus at the glenoid cavity allow for a wide range of shoulder movements.

Front

What is the difference between the radius and ulna?

Back

The radius is located on the thumb side of the forearm and is involved in wrist movement, while the ulna is on the opposite side and is primarily involved in elbow joint stability.