Anatomy of the Appendicular Skeleton

What is the primary function of the clavicle in the appendicular skeleton?

Which part of the scapula articulates with the clavicle?

What is the function of the ischial tuberosity in the pelvic girdle?

How many bones comprise the appendicular skeleton?

Which joint connects the sacrum and ilium in the pelvic girdle?

What structure serves as the socket for the head of the femur in the pelvic girdle?

Which part of the upper limb is specifically referenced as always shown palm facing up?

Which component is NOT included in the composition of the pelvic girdle?

What type of joint is formed at the pubic symphysis?

What type of articulation occurs between the glenoid fossa and the head of the humerus?

The Appendicular Skeleton

Consists of 126 bones:
- The pectoral girdle
- The pelvic girdle
- The upper and lower limbs

The Pectoral Girdle

Consists of the clavicle and the scapula.
- The clavicle:
  - Also known as the collar bone.
  - Articulates with the manubrium of the sternum and the acromion process of the scapula.
  - Forms the connection between the axial and the appendicular skeleton.
- The scapula:
  - The acromion process articulates with the clavicle.
  - The cavity referred to as the glenoid fossa or glenoid cavity articulates with the head of the humerus (upper limb bone).
  - The glenoid fossa and the humerus together form the shoulder.
  - The muscles of the arm and chest are attached by the coracoid process.

The Pelvic Girdle

Composed of two os coxa
Each os coxa has:
- An ilium that articulates with the sacrum at the iliac crest.
- An ischium:
  - The inferior surface is called the ischial tuberosity.
  - Bears the weight of the body while sitting.
- A pubic bone:
  - The two pubic bones are joined by a cartilaginous disk called a pubic symphysis.

Pelvic Girdle Joints

The sacroiliac joint:
- A synovial joint.
The pubic symphysis:
- Joins the two pubic bones.
- Formed from cartilage.
The acetabulum:
- The socket that articulates with the head of the femur (upper leg bone).
- Also known as the hip bone.
- A synovial joint:
  - Ball and Socket.
  - Joins the L5 lumbar vertebrae and the sacrum.

The Upper and Lower Limbs

The arm (numbers are 1 per arm)
- Always shown palm facing up.

Explore the structures and components of the appendicular skeleton, including the pectoral and pelvic girdles, and the upper and lower limbs. Understand the role of each bone in forming connections and supporting movement in the body. This quiz covers essential anatomical knowledge related to human skeletal structure.