5h 55min, nov 28, 2002 y - The Heart Beats

Description:

What's this pounding on my chest. Oh my, it's my heartbeat. Blood can now pump through my veins that are still forming. Ooh, let me feel my heart beat, grow faster, faster. Lindsey, Stephanie E., et al. “Mechanical Regulation of Cardiac Development.” Frontiers, Frontiers, 3 Aug. 2014, www.frontiersin.org/articles/10.3389/fphys.2014.00318/full.