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 TM
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T1 through T12
The letter "T" stands for "thoracic," which is Greek for "chest." So T1 refers to the 1st thoracic bone, T2 to the 2nd thoracic bone, T3 to the 3rd thoracic bone, and so on, until T12, which is the last thoracic bone. T1 is at the top and T12 is at the bottom, with the numbers in between going down the body in numerical order. For example, T3 is below T2, T4 is below T3, and so on.
Refers to the twelve vertebrae (bones that form an opening in which the spinal cord passes) that are behind an area of the body known as the thorax, which is another name for chest. The thorax (chest) is a cage of bones and cartilage (a type of tissue) that extends from the bottom of the neck to a muscle known as the diaphragm, which separates it from the belly.
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