The Axial skeleton is comprised of bones.

Correct Answer: D

Rationale: The axial skeleton includes the skull (22 bones), vertebral column (26 bones), ribs (24 bones), and sternum (1 bone), totaling 80 bones. The appendicular skeleton has 126 bones, making 90 and 126 incorrect, and 60 too low for the axial components.

Correct Answer: B

Rationale: Sutures are the serrated, immovable joints connecting cranial bones, such as the coronal or sagittal sutures. 'Sews' and 'stitches' relate to sewing, not anatomy, making 'sutures' the precise term.

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 spinous process is the rear-most projection of a vertebra, extending from the vertebral arch for muscle and ligament attachment. 'Spine' is too general, and 'spinal' is an adjective, not the structure’s name.

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.