PHY100H1 Lecture Notes - Lecture 3: Dorsal Root Ganglion, Arachnoid Mater, Medulla Oblongata
10
PHY100H1 Full Course Notes
Verified Note
10 documents
Document Summary
Anatomy of the cns: the vertebrate, cns, consists of the brain and the spinal cord, seven regions of the brain: the cerebrum, diencephalon, midbrain, cerebellum, pons, medulla oblongata and the spinal cord. The cns is divided into gray and white matter: when viewed under a microscope, the tissue is divided into white and gray. Matter: gray matter: consists of unmyelinated nerve cell bodies, dendrites and axons, cluster of cell bodies in the brain and spinal are called nuclei, white matter: is mostly myelinated axons and contains very few cell bodies. The blood brain barrier protects the brain: the final layer of protection for the brain is a functional barrier between the interstitial fluid and the blood. This barrier is necessary to isolate the body"s main control center from potential harmful substances in the blood and from blood-borne pathogens such as bacteria.
