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What is IX, X and XI cranial nerves are transmitted through: and explain in detail?
Jugular foramen:
It is a large elongated foramen at the posterior end of the petro-occipital suture. Its anterior wall is hollowed out to form the jugular fossa.
The jugular foramen transmits the following structures.

Through the anterior part: a. Inferior petrosal sinus b. Meningeal branch of the ascending pharyngeal artery.
Through the middle part: IX, X and Xl cranial nerves.
Through the posterior part: a. Internal jugular vein. b. Meningeal branch of the occipital artery.