Regional anatomy
Thermodynamics is concerned with macroscopic processes
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choices
normative economics
normative economics
Chemistry
come again???
Certainly; the Environmental Protection Agency is primarily concerned with pollution and environmental hazards.
A specialist in the study of substances is a chemist; chemistry is the study of the properties of different substances.
The study of the ear is in the field of ear/ nose/ and throat. This field is called otolaryngolgy. The diseases are called otolaryngolic diseases. The doctor in this field is called and ENT doctor.
Ear Nose and Throat Specialist This term has become the common term for the practice of otorhinolaryngology. From the original Greek it means the study of the ear nose and throat. We have just abbreviated it as ENT to make things simple.
Space-based exploration and study is the primary role of an astronaut. A space traveler who is not primarily an astronaut is called a mission specialist.