Answer
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Work Step by Step
The skull and the nasal septum contain several important cavities that are involved in breathing, smelling, and other important physiological processes.
Cavities within the skull:
1. Cranial cavity: This is the largest cavity within the skull and contains the brain, meninges, and cerebrospinal fluid.
2. Nasal cavity: This is the large, air-filled space above the roof of the mouth that is lined with mucous membranes and cilia. The nasal cavity is divided into left and right halves by the nasal septum.
3. Oral cavity: This is the space behind the teeth and gums that is involved in chewing, swallowing, and speech.
4. Sinuses: These are hollow, air-filled spaces within the skull that are lined with mucous membranes. There are four pairs of sinuses in the skull: the frontal sinuses, ethmoid sinuses, sphenoid sinuses, and maxillary sinuses. The sinuses help to reduce the weight of the skull and produce mucus that helps to humidify and filter air.
Cavities within the nasal septum:
1. Perpendicular plate of the ethmoid bone: This forms the superior portion of the nasal septum and separates the nasal cavity from the brain.
2. Vomer bone: This forms the inferior and posterior portion of the nasal septum.
3. Septal cartilage: This forms the anterior portion of the nasal septum and is made of hyaline cartilage.
Together, the cavities within the skull and the nasal septum play important roles in respiration, olfaction, and other physiological processes.
