Mindblown: a blog about philosophy.
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Sigmoid sinus
In the venous circulation of the brain, the continuation, on both sides, of the transverse sinuses down along the posterior border of the petrous part of the temporal bone to the jugular foramen and jugular veins.
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Sinus rectus
A venous sinus at the junction of the falx cerebri and the cerebellar tentorium.
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Sinus of the pulmonary trunk
One of the dilatations in the pulmonary trunk, across from a cusp of the pulmonary valve of the heart. The sinuses in the pulmonic trunk are smaller than those in the aorta.
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Pleural sinus
One of the spaces in the pleural sac along the lower and inferior portions of the lung that the lung does not occupy.
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Marginal sinus
A large venous sinus around part of the margin of the placenta.
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Lymph sinus
A pathway for lymph through a lymph node.
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Inferior sagittal sinus
A venous sinus in the inferior margin of the falx cerebri.
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Inferior petrosal sinus
A large venous sinus from the cavernous sinus, running along the lower margin of the petrous portion of the temporal bone.
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Hair sinus
The sinus formed when hair is embedded in the skin and acts as a foreign body.
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Ethmoidal sinus
One of the air cavities in the ethmoid bone. An air-filled cavity located in the ethmoid bone situated behind the nose.
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