Hoover MA, Pelaez NJ. Blood circulation laboratory investigations with video are less investigative than instructional blood circulation laboratories with live organisms. Adv Physiol Educ 31: 55–60, 2008; doi:10.1152/advan.00009.2007.—Live organisms versus digital video of the organisms were used to challenge students’ naive ideas and misconceptions about blood, the heart, and circulatory patte...