Anatomy and Cell Biology 3319 Lecture Notes - Lecture 1: Dura Mater, Septum Pellucidum, Arachnoid Mater
15 Dec 2017
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Document Summary
Ventricles: expansions of brain"s central cavity: filled with cerebrospinal fluid, lined by ependymal cells. Brain is protected from injury by surrounding connective tissue membranes called meninges, and by watery cushion of cerebrospinal fluid produced in ventricles. The blood brain barrier protects the brain from harmful substances in the blood (e. g. chemicals) 3 connective tissue membranes that lie external to the brain and spinal cord. Functions: cover and protect cns, enclose and protect the blood vessels that supply the cns, contain the cerebrospinal fluid. From external to internal, the meninges are the dura mater, arachnoid mater, and pia mater. Extend around the spinal cord and are continuous throughout the cns. The superficial periosteal layer attaches to internal surface of the skull bones. The deeper meningeal layer forms the external covering of the brain. Attaches anteriorly to crista galli of the ethmoid bone: the falx cerebelli continues inferiorly from the posterior part of the falx cerebri.
