1. A Comparative Evaluation of Macrophage Abundance and Phenotype in the Hearts and Livers of Aged Fischer 344 Rats Open Access Author: Sullivan, Megan Title: A Comparative Evaluation of Macrophage Abundance and Phenotype in the Hearts and Livers of Aged Fischer 344 Rats Area of Honors: Letters, Arts, and Sciences (Abington) Keywords: BiologyAgingMacrophagesImmunohistochemistry File: Download SullivanThesis_April3rd.pdf Thesis Supervisors: Steven Bloomer, Thesis SupervisorDavid Ruth, Thesis Honors Advisor