Which bones make up the upper jaw?

• A. Maxillae
• B. Mandible
• C. Zygomatic bones
• D. Nasal bones

Answer: (A)

Verified step by step guidance

1. Understand the anatomy of the upper jaw: The upper jaw is primarily formed by the maxillae, which are paired bones that fuse together at the midline. These bones house the upper teeth and form part of the orbit and nasal cavity.
2. Clarify the role of the mandible: The mandible is the lower jawbone and does not contribute to the upper jaw. It is a separate structure responsible for housing the lower teeth and facilitating jaw movement.
3. Examine the zygomatic bones: The zygomatic bones, also known as cheekbones, contribute to the lateral walls of the orbit but do not form part of the upper jaw.
4. Analyze the nasal bones: The nasal bones are small paired bones that form the bridge of the nose. While they are located near the upper jaw, they do not directly contribute to its structure.
5. Conclude that the maxillae are the correct answer: Based on anatomical understanding, the maxillae are the bones that make up the upper jaw, while the mandible, zygomatic bones, and nasal bones are separate structures with distinct roles.