The student effectively incorporates relevant and appropriate source material to address the research question, utilizing secondary sources such as studies from the Mayo Clinic and the Journal of Thoracic and Cardiovascular Surgery. The source material is integrated well throughout the essay, with proper referencing in the Bibliography. However, the student fails to ensure that most of the sources are from accredited scientific materials, as some entries are non-peer-reviewed. Additionally, not all technical terms are clearly defined, which detracts from demonstrating comprehensive knowledge of the topic. While the academic tone is maintained and subject-specific terms are used judiciously, the inconsistency in the presentation of quantitative data indicates a need for improvement in the use of symbols and units.