课件:医学课件
33页1、The Central Nervous System,Meninges,1. Definition: Protective membranes between bone and nervous system soft tissues,2. Made of 3 layers a. Dura mater (tough mother) -outermost layer b. Arachnoid mater (spider mother) -middle layer c. Pia mater (delicate mother) -inner layer,Cerebrospinal fluid (CSF),Definition: a clear watery liquid produced in the ventricles of the brain.,Spinal cord,1. Anatomy: a. bundle of neurons, about 17“ in length,b. made of 2 types of tissue 1) gray matter- made of nerv
2、e cell bodies, neuroglial cells and blood vessels 2) white matter- made of axons c. consists of 31 segments- each segment gives rise to a pair of spinal nerves,Draw the location of the nerve cell bodies and axons.,2. Physiology a. conducts nerve impulses b. serves as a center for spinal reflexes,Structures of a vertebra,Structures of the CNS,The Brain,DEFINITION: The part of the CNS located within the skull composed of 100 billion neurons and even more glia cells weighs 3 pounds,FUNCTION primary
3、 receiver, organizer and distributor of information for the body Can you put this in your own words?,Spinal cord,Brain stem:Responsible for basic life functions such as Breathing Heartbeat Blood pressure Scientists say that this is the “simplest“ part of human brains because a reptiles (who appear early on the evolutionary scale) entire brain resembles our brain stem.,Spinal cord,2,1,Thalamus -interprets all senses except smell -synapses for voluntary movement Hypothalamus -controls the autonomi
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