Question

lo 3.6. the thoracic cage is formed by the __ and __.

pelvis and femur

sternum and 12 pairs of ribs with their costal cartilage

clavicle and scapula

sacrum and coccyx

vertebrae and intervertebral discs

Explanation:

The thoracic cage is an important anatomical structure. It is composed of the sternum (breast - bone) and 12 pairs of ribs along with their costal cartilages. This structure protects vital organs such as the heart and lungs. The other options list structures that are not part of the thoracic cage formation. For example, the pelvis and femur are part of the lower - body skeletal system, the clavicle and scapula are part of the shoulder girdle, the sacrum and coccyx are part of the pelvic region, and the vertebrae and intervertebral discs are part of the vertebral column but not the main components of the thoracic cage.

Answer:

sternum and 12 pairs of ribs with their costal cartilage