In the case of a spinal break that causes someone to become paralyzed, why would organs and other bodily functions un-affected if the cause is a separation of the brain’s ability to communicate with the body? Does the brain not also subconsciously control breathing, heart beat, etc?
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A lot of the organ functions are regulated through the endocrine or hormone system. Your brain will release chemicals that make it to your thyroid and the thyroid will then release chemicals into the blood and those chemicals will then act on the organs triggering further chemical reactions. The endocrine can typically skip the spinal stimulation altogether albeit some may travel down the spinal area or through the spinal fluid, as long as they enter the blood stream they’ll make it to the organ. Sometimes hormones can go straight from the brain to the organ. Typically the hormones are made in super long strands and cut up into pieces and delivered to multiple organs at once. Since the lungs and heart work directly with the muscles they are more susceptible to nerve damage. Some bodily functions are regulated from the top of the spine and into the medulla or bottom of the brain so these functions would still be regulated as normal with a mid or lower spine injury.
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