often called Sinuses
Place ref this link to sinus(es)sinus-anatomy
The diaphragm is a thick muscle separating the thoracic and abdominopelvic cavities.
All bones of a newborn start as cartilage therefore has no cavities. As the baby grows up, they turn into bones through ossification.
marrow
The sinuses are mucous membrane-lined cavities in some of the skull bones surrounding the nose. They help make the skull lighter.
The maxilla is the keystone of the face and all other facial bones articulate with them. They form part of the lateral walls and most of the floor of the nasal cavity, part of the floor of the orbital cavities and three fourths of the roof of the mouth, or hard palate. If you break these, your face will collapse.
sinuses.
Yellow marrow is found in large cavities of large bones.
The face consists of 14 individual bones, which fuse to house the orbits of the eyes, nasal and oral cavities, as well as the sinuses. The frontal bone, typically a bone of the calvaria, is sometimes included as part of the facial skeleton.
How many bones are in the face
only in the spinal cavity all of the others the bones are the borders of the cavities.
The teeth. Maybe the bones too? But generally when people say cavities without a qualifier, they mean in their teeth.