biology - brain

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1. Highest level of motor & sensory integration in the human body. Meninges- It’s a three layer tissue that surround the entire Central Nervous System forming the lat protective barrier of the brain.

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June 29, 2009BRAIN: 1. Highest level of motor & sensory integration in the human body.Facts: A. Brain is part of the CNS (central Nervous System)B. Protection of the brain A. Cranium Major Protection of brain B. spinal fluid which is second level of protection C. Meninges Meninges- Its a three layer tissue that surround the entire Central Nervous System forming the lat protective barrier of the brain.1. Are the 3rd layers of protection. 2. Have 3 layers of tissue that surrounds the entire CNS forming the last protective layer of the brain. 3. It allows some chemicals to reach the brain while prohibiting other chemicals from entering. (Ex) alcohol does pass through the meningies antibodies do not pass through meningies. The meninges are referred to as the blood brain barrier membrane. Meningitis- Inflammation of the meningies(Think inside out) I Dura Mater (hard mother)Composed of course collegen and elastinA. Endosteal Dura- Strong white fibourous tissue and merges with the underside of the cranial bone so they become continuous. B. Menelingeal Dura- made of elastin. Also strong but more flexible than the collegen------------------------------------------------------------------------------------------------------------------------------------------Sub dura space- shaped like bubble wrap between the menengial dura and the arachnoid mater and its filled with spinal fluid__________________________

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