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<h2 /><h2>An essential part of the holding capacity of tissues is the extracellular area. The extracellular region is primarily occupied by a complicated network of macromolecules constituent called as extracellular matrix (ECM). The composition of ECM is varied, depends on the species and also developing or ground molecules Commonly, the ECM is composed of three major classes of biomolecules; there are glycosaminoglycans (GAGs), linked to a protein known as the proteoglycans, and also fibrous proteins, including collagen, elastin, fibronectin, vitronectin, and laminin.</h2>
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Glycolysis, Citric acid cycle and Electron transport chain.
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Like the brain, the spinal cord is covered by the meninges and cushioned by cerebrospinal fluid. Spinal nerves connect the brain with the nerves in most parts of the body. Other nerves go directly from the brain to the eyes, ears, and other parts of the head.
The spinal cord is a single structure, whereas the adult brain is described in terms of four major regions: the cerebrum, the diencephalon, the brain stem, and the cerebellum.
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