BIOL 336 Lecture Notes - Lecture 17: Choroid Plexus, Dura Mater, Pia Mater
14 Aug 2016
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Be able to: distinguish the 3 membrane layers that surround the brain and the spinal cord, explain the process of formation, direction of flow, and functions of the cerebrospinal fluid (csf) in the nervous system. The brain is encased in a bony skull (or cranium) and the spinal cord runs through a canal in the vertebral column. The cortex of each cerebral hemisphere is divided into four lobes: frontal, parietal, occipital and temporal lobes. The neurons and glial cells of the brain do not come into direct contact with boney structures. Extracellular fluid helps cushion the delicate neuroal tissue in a final protective component of the cns. It has two components: cerebrospinal fluid (csf), found in the ventricles and in the subarachnoid space. Csf is produced by choroid plexus, a specialized region on the walls of ventricles that continuously secretes csf. The plexus consists of capillaries and a transporting epithelium derived from the ependyma.
