The two nasal chambers are separated by the maxilla bone in humans.

The maxilla bone, also known as the upper jawbone, plays a crucial role in the structure of the face and skull. It is a paired bone that forms the central part of the facial skeleton and is located beneath the orbits (eye sockets) and above the mouth.

Function of the Maxilla Bone
The maxilla bone serves several important functions, including:
1. Support: It provides support to the upper teeth and forms the roof of the mouth (hard palate).
2. Protection: The maxilla bone protects various structures, such as the nasal cavities, sinuses, and the floor of the orbits.
3. Airway Passage: It forms the lateral walls of the nasal cavities, separating the two nasal chambers.

Structure of the Maxilla Bone
The maxilla bone is a complex structure that consists of several parts, including:
1. Body: The main part of the maxilla bone is the body, which forms the upper jawline and houses the upper teeth.
2. Alveolar Process: This is the ridge-like extension of the maxilla bone that contains the sockets for the upper teeth.
3. Palatine Process: The palatine process extends horizontally from the body of the maxilla bone and forms the anterior part of the hard palate, separating the oral and nasal cavities.
4. Frontal Process: The frontal process of the maxilla bone contributes to the formation of the medial wall of the orbit (eye socket).
5. Zygomatic Process: This process forms the posterior part of the lateral wall of the orbit and articulates with the zygomatic bone.

Separation of Nasal Chambers
The maxilla bone contributes to the separation of the two nasal chambers. It forms the lateral walls of the nasal cavities, along with the perpendicular plate of the ethmoid bone and the nasal septum. The nasal septum is formed by the perpendicular plate of the ethmoid bone in the midline and the vomer bone posteriorly.

In conclusion, the maxilla bone separates the two nasal chambers in humans. It forms the lateral walls of the nasal cavities and plays a vital role in supporting the upper teeth, protecting various structures, and forming the roof of the mouth.

Ethmoid bone .. it's given in ncert.