It is a closed sac having two layers: the visceral layer (epicardium), immediately surrounding the heart, and the outer parietal layer, forming the sac, composed of strong fibrous tissue, the fibrous pericardium, lined with a serous membrane, the serous pericardium. Synonym(s): heart sac, theca cordis.
The right and left cavernous sinuses are interconnected by the anterior and posterior intercavernous sinuses. Tributaries of the cavernous sinus include the superior ophthalmic, superficial middle cerebral, and inferior cerebral veins and the sphenoparietal sinus.
TMJ Disorders. Temporomandibular joint or TMJ disorders can cause right-sided jaw and ear pain. The TMJ is a paired joint located on the side of the head, just in front of the ears. The TMJ allows a person to talk, chew food and yawn.