Anything passes through the jugular foramen

This foramen is incompletely bifurcated anteriorly and posteriorly by an intrajugular process and has a gourd shape.
Anterior part (small)
Glossopharyngeal nerve(cranial nerve IX)
Vagus nerve(cranial nerve X)
Accessory nerve(cranial nerve XI)
Inferior petrosal sinus
Posterior part (large)
Jugular vein