What type of tissue absorbs X-rays?

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Teeth and bones are highly mineralized tissues that consist mainly of calcium phosphate, which has a higher density than soft tissues like skin, muscle, or fat. When X-rays are passed through the body, these dense structures absorb more of the radiation compared to the surrounding tissues. This absorption creates a contrast that allows for clear imaging in X-ray examinations. In contrast, soft tissues like muscle and fat do not absorb X-rays to the same extent, resulting in less visibility on an X-ray image. This property is the reason why teeth and bones appear white on an X-ray film, while other tissues appear in shades of gray or black. The ability of these dense tissues to absorb X-rays is crucial for diagnostic imaging, as it helps clinicians to identify abnormalities or conditions related to the skeletal structure.