From left, students Ethan Mulcahy and Jason Clapp, volunteer Thad Duncan and student Adalie Perez dissect sheep hearts to learn about the circulatory system.
From left, students Ethan Mulcahy and Jason Clapp, volunteer Thad Duncan and student Adalie Perez dissect sheep hearts to learn about the circulatory system. JOHNSTON COUNTY SCHOOLS
From left, students Ethan Mulcahy and Jason Clapp, volunteer Thad Duncan and student Adalie Perez dissect sheep hearts to learn about the circulatory system. JOHNSTON COUNTY SCHOOLS

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