Bones that are plate like with a broad surface are classified as bones.

Correct Answer: A

Rationale: Flat bones, such as the scapula and cranial bones, are thin, broad, and plate-like, offering protection (e.g., skull) and muscle attachment surfaces. Irregular bones are complex, long bones are cylindrical, and short bones are cube-like, making 'flat' the correct answer.

Correct Answer: D

Rationale: Osteoclasts, which break down bone, derive from monocytes (white blood cells) in the bone marrow. Osteoprogenitor cells are stem cells, osteoblasts form bone, and osteocytes maintain it, making 'osteoclasts' the correct answer.

Correct Answer: A

Rationale: Bone fracture repair occurs in four stages: 1) hematoma (blood clot) forms at the break, 2) fibrocartilage callus bridges the gap, 3) bony callus replaces it with spongy bone, 4) remodeling shapes it into compact bone. 'hematoma, fibrocartilage callus, bony callus, remodeling' is correct.

Correct Answer: A

Rationale: Cranial bones form the cranium: frontal, parietal, occipital, temporal, sphenoid, and ethmoid. The ethmoid is cranial, while nasal, vomer, and zygomatic are facial bones, making 'ethmoid' correct.

Correct Answer: B

Rationale: The maxillae form the upper jaw, supporting upper teeth and part of the palate. The mandible is the lower jaw, vomer the nasal septum, and zygomatic the cheeks, making 'maxillae' correct.