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Multiple Choice

Which procedure is invasive due to entering the body?

Invasiveness refers to procedures that breach the body's surfaces or enter internal spaces. Catheterization requires threading a thin tube into a blood vessel or body cavity, often through the skin or mucous membranes, placing a device inside the body. That entry into the interior makes it invasive. The other options stay outside the body: urine analysis involves collecting a urine sample without breaking the body's barriers, while MRI and ultrasound image internal structures from outside the body without penetrating tissues.

Invasiveness refers to procedures that breach the body's surfaces or enter internal spaces. Catheterization requires threading a thin tube into a blood vessel or body cavity, often through the skin or mucous membranes, placing a device inside the body. That entry into the interior makes it invasive. The other options stay outside the body: urine analysis involves collecting a urine sample without breaking the body's barriers, while MRI and ultrasound image internal structures from outside the body without penetrating tissues.