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  2. Blood–brain barrier - Wikipedia

    en.wikipedia.org/wiki/Blood–brain_barrier

    The blood–brain barrier (BBB) is a highly selective semipermeable border of endothelial cells that regulates the transfer of solutes and chemicals between the circulatory system and the central nervous system, thus protecting the brain from harmful or unwanted substances in the blood. [1]

  3. Nervous tissue - Wikipedia

    en.wikipedia.org/wiki/Nervous_tissue

    Nervous tissue, also called neural tissue, is the main tissue component of the nervous system.The nervous system regulates and controls body functions and activity. It consists of two parts: the central nervous system (CNS) comprising the brain and spinal cord, and the peripheral nervous system (PNS) comprising the branching peripheral nerves.

  4. Blood–spinal cord barrier - Wikipedia

    en.wikipedia.org/wiki/Blood–spinal_cord_barrier

    These blood compounds are toxic to nervous tissue and precipitate neuroinflammation, edema, and eventual motor neuron death. [ 10 ] [ 12 ] [ 13 ] Multiple sclerosis (MS), a neurodegenerative, autoimmune disease that deteriorates the myelin sheath coating axons and causes permanent damage to nerves, has also been associated with capillary and ...

  5. Nervous system - Wikipedia

    en.wikipedia.org/wiki/Nervous_system

    The nervous system consists of nervous tissue which, at a cellular level, is defined by the presence of a special type of cell, called the neuron. Neurons have special structures that allow them to send signals rapidly and precisely to other cells.

  6. Human brain - Wikipedia

    en.wikipedia.org/wiki/Human_brain

    The brain, although protected by the blood–brain barrier, can be affected by infections including viruses, bacteria and fungi. Infection may be of the meninges ( meningitis ), the brain matter ( encephalitis ), or within the brain matter (such as a cerebral abscess ).

  7. Brain - Wikipedia

    en.wikipedia.org/wiki/Brain

    Even though it is protected by the skull and meninges, surrounded by cerebrospinal fluid, and isolated from the bloodstream by the blood–brain barrier, the delicate nature of the brain makes it vulnerable to numerous diseases and several types of damage. In humans, the effects of strokes and other types of brain damage have been a key source ...

  8. Meninges - Wikipedia

    en.wikipedia.org/wiki/Meninges

    The dura mater is attached to the skull, whereas in the spinal cord, the dura mater is separated from the vertebrae by a space called the epidural space, which contains fat and blood vessels. The arachnoid is attached to the dura mater, while the pia mater is attached to the central nervous system tissue.

  9. Microglia - Wikipedia

    en.wikipedia.org/wiki/Microglia

    The brain and spinal cord, which make up the CNS, are not usually accessed directly by pathogenic factors in the body's circulation due to a series of endothelial cells known as the blood–brain barrier, or BBB. The BBB prevents most infections from reaching the vulnerable nervous tissue.