BIOL 2040 Chapter 3: chapter 3

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Nervous system: a complex system with 2 primary divisions: the central nervous system and the peripheral nervous system. 3. 2 structure and function of the central nervous system: estimated 100 billion neurons in your brain are assembled into complex networks that enable you to, subconsciously regulate internal environment by neural means, experience emotions. !1: voluntarily control movements, perceive own body and surroundings, engage in other higher cognitive processes (thought) Diencephalon: houses hypothalamus and the thalamus, hypothalamus. Oligodendrocytes: form insulate myelin sheaths around axons in the cns, has several elongated projections, each of which is wrapped jelly-roll fashion around a section of an interneuronal axon to form a path of myelin. Meningeal membranes: wrapping, protecting, and nourishing: the meninges, the 3 membranes that wrap the cns are from the outermost to the innermost layer, the dura mater, the arachnoid mater, and the pia mater.

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