EVERYDAY SCIENCE

Detailed explanation-1: -For example, the vertebrae, irregular bones of the vertebral column, protect the spinal cord. The irregular bones of the pelvis (pubis, ilium, and ischium) protect organs in the pelvic cavity.

Detailed explanation-2: -The hip bones, several facial and skull bones, and the spinal vertebrae are all examples of irregular bones.

Detailed explanation-3: -Examples of flat bones are the sternum (breast bone), ribs, scapulae (shoulder blades), and the roof of the skull (Figure 1). Irregular bones are bones with complex shapes. These bones may have short, flat, notched, or ridged surfaces. Examples of irregular bones are the vertebrae, hip bones, and several skull bones.

Detailed explanation-4: -Answer and Explanation: The irregular bones are literally found all over the body including the bones of the spinal column called vertebrae. The sacrum and coccyx are also examples of irregular bones. The cranial bones, ethmoid and sphenoid, can be classified as irregular bones.