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Dural venous sinuses are areas where: cerebrospin
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Dural venous sinuses are areas where the meningeal and periosteal layer separate from large blood filled spaces.

Dural sinuses/ venous sinus/ cranial sinus are the spaces located between the two layers of dura mater. The inner layer is meningeal layer and outer periosteal (endosteal) layer . They contain venous blood, connected to the venous system which carry blood to brain and return to heart.

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