Answer
The paranasal sinuses include the frontal sinus (located in anterior part of the frontal bone), the sphenoid sinus (located in the sphenoid bone), the ethmoid sinus (located in the ethmoid bone), and the maxillary sinus (located in the maxillae).
Four other cavities are the cranial cavity, the orbits, nasal cavity, and oral cavity.
Work Step by Step
The paranasal sinuses are named after the bones they occur in. The four paranasal sinuses are the frontal, sphenoid, ethmoid, and maxillary.
Other cavities are the cranial cavity, the orbits, nasal cavity, oral cavity, and the middle and inner ear cavities.
