The 14 facial bones include ... bones, which form the upper jaw and part of the face.

Correct Answer: B

Rationale: The maxillary bones (maxillae), a pair of facial bones, form the upper jaw and parts of the face (e.g., orbits, nasal cavity). The vomer is a single facial bone forming part of the nasal septum, not the upper jaw.

Correct Answer: B

Rationale: The humerus is the single bone of the upper arm, extending from the shoulder to the elbow. The forearm contains the radius and ulna, not the humerus.

Correct Answer: B

Rationale: Each hip bone (os coxa) in an adult is formed by the fusion of three bones: ilium, ischium, and pubis, which unite at the acetabulum during development.

Correct Answer: B

Rationale: The hallux (big toe) has 2 phalanges (proximal and distal), like the thumb, unlike the other toes, which have 3 (proximal, middle, distal), due to its structural role.

Correct Answer: B

Rationale: Osteoclasts are specialized cells that break down (resorb) bone tissue, releasing minerals like calcium into the bloodstream during remodeling or repair. Osteoblasts build bone, hematopoietic cells in marrow produce blood, and chondroblasts form cartilage—none match 'osteoclast.'