Unpaired facial bones are:
Correct answer: D. Mandible, Vomer
- A. Maxilla, Zygomatic
- B. Palatine, Inferior concha
- C. Nasal, Lacrimal
- D. Mandible, Vomer
Explanation
Option A: The maxillae are the largest bones in the face and form the upper jaw. The zygomatic bones are the cheekbones. Option B: The palatine bones form the hard palate. The inferior nasal conchae are the small, scroll-shaped bones that project into the nasal cavity. Option C: The nasal bones form the bridge of the nose. The lacrimal bones are small, teardrop-shaped bones that form part of the eye socket. Option D: The facial bones are the bones that form the face of the skull. There are 14 facial bones, of which 6 are paired and 2 are unpaired. The unpaired facial bones are the vomer and the mandible. The vomer is a small, triangular bone that forms the posterior part of the nasal septum. It is the only unpaired bone in the nasal cavity. The mandible is the largest and strongest bone in the face. It forms the lower jaw and is the only movable bone in the skull.
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Support and movement covers the axial and appendicular skeleton, bone structure, joints and the arrangement of skeletal muscles. Muscle contraction is explained through actin, myosin, sliding filaments, calcium ions and ATP, while arthritis is distinguished as a disorder of joints rather than a normal part of movement.
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