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Here are the definitions for the terms:
- Foramen: A foramen is a small opening or hole in a bone that allows for the passage of blood vessels, nerves, or other structures.
- Suture: A suture is a type of joint in the skull where two bones are tightly fused together. Sutures help to strengthen the skull and protect the brain.
- Paranasal sinus: A paranasal sinus is a hollow, air-filled space within a bone of the skull that is connected to the nasal cavity. There are four pairs of paranasal sinuses: the maxillary sinuses, ethmoid sinuses, frontal sinuses, and sphenoid sinuses.
- Fontanel: A fontanel is a soft, membranous gap between the bones of a baby's skull that has not yet fully fused together. There are two fontanels in the human skull: the anterior fontanel, which is located at the top of the head, and the posterior fontanel, which is located at the back of the head. These fontanels allow for the skull to be compressed during birth and for the brain to grow rapidly during infancy.
