Human Skeletal System Quiz

The skeletal system has five major functions: support, protection, movement, mineral storage, and blood cell formation.

There are approximately 206 bones in the human skeletal system.

The axial skeleton is the central part of the skeleton, including the skull, vertebral column, and thoracic cage.

The appendicular skeleton is made up of the limbs and the girdles attaching them to the axial skeleton (Pectoral and Pelvic girdle).

The vertebral column has 5 sections: cervical (7), thoracic (12), lumbar (5), sacral (5), and coccygeal (4).

There are 12 pairs of ribs: 7 true ribs, 3 false ribs, and 2 floating ribs.

Long bones are longer than they are wide, and include the humerus (upper arm) and femur (thigh).

Short bones are cube-shaped and wider than they are long, such as the carpals (wrist) and tarsals (ankle).

Flat bones are thin, flat, and curved bones, like the sternum (breastbone), scapula (shoulder blade), and ribs.

Irregular bones have odd shapes, as found in the vertebrae (spine) and hip bones.

Synarthrotic joints are fibrous joints that are immovable, such as the cranial sutures.

Diarthrotic joints are synovial joints that allow free movement. Example: knee and shoulder.

Amphiarthrotic joints are cartilaginous joints that are slightly movable, such as the pubic symphysis and intervertebral discs.

Two main types of bone tissue are compact bone (strong and dense) and spongy bone (porous and light).