Emir is taking a premed class where they need to study all of the structures of the body, including the nervous system, respiratory system, and reproductive system. he is taking a class on

Emir is most probably taking a class on human anatomy. Human anatomy involves all the structures in the composition of the human body. Human anatomy can be studied either by systems (i.e. cardiovascular system, respiratory system, etc.) or by regions (i.e. thoracic anatomy, abdominal anatomy, pelvic anatomy, head and neck anatomy, etc.) depending on the course.

Mg is used to measure mass