Final answer:
A structure that is easily penetrated by X-rays is called radiolucent. Radiolucent materials, such as soft tissues, allow for detailed medical imaging by presenting darker shades on an X-ray film, while harder materials like bones appear lighter.
Step-by-step explanation:
The structure that is easily penetrated by X-rays is called radiolucent. X-rays are a form of high-energy electromagnetic radiation that can pass through some materials while being absorbed or blocked by denser materials. In the context of medical imaging, radiolucent substances, such as soft tissues, allow X-rays to pass through and appear darker on an X-ray film, compared to radiopaque materials like bones, which block more of the X-rays and thus appear lighter. Radiolucent items are crucial for identifying issues within the softer, less dense parts of the body during radiological examinations.
The use of X-rays is prevalent in the medical field, specifically in radiology, for imaging bones, teeth, and other internal structures. Understanding the penetration power of X-rays helps medical professionals produce accurate images for diagnosis and treatment planning.