Answer: Radioactively-labeled materials
Explanation: nuclear medicine is a medical specialty that uses radioactive tracers to diagnose and treat different diseases. Radioactive tracers are materials that can vary according to the purpose of the method. For most diagnostic, the radioactive tracer is administered by intravenous injection. However it may also be administered by inhalation, by oral ingestion, or by direct injection into an organ.
SPECT scans are primarily used to diagnose and track the progression of heart disease, and the major purpose of PET scans is to detect cancer and monitor its progression, response to treatment, and to detect metastases. This two methods are the most used in nuclear medicine.
I'm pretty sure that it is (Germany) :)
Inside its beak, an octopus has a rasping tongue that is used to tear apart food. It is analogous to <u>Radula.</u>
The radula, part of the odontophore, may be protruded, and it's far utilized in drilling holes in prey or in rasping meals debris from a floor. it is supported through a cartilage-like mass (the odontophore) and is covered with rows of many small teeth (denticles).
The radula is the organ for mechanical food processing and a crucial autapomorphy of Mollusca. Its chitinous membrane, embedding small radular teeth, is moved with the aid of the set of muscle groups resulting in an interplay with the ingesta, tearing it and amassing loosened particles.
The radula is a file-like rasping organ with transverse rows of chitinous teeth present in the buccal hollow space of many mollusks. it's miles used for scraping or cutting food before it enters the stomach. it is ribbon-like and corresponds to the tongue.
Learn more about Radula<u> </u>here
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