🐋 Balaenoptera musculus, the blue whale, is the largest animal to ever live on Earth, and with such massive size, it needs an even bigger heart. In fact, blue whales have the biggest hearts on the planet, weighing over 450 kg (1000 lbs)!
Each heartbeat pumps about 230 liters of blood, and the aorta is so large that a human could crawl through it!
📸 Courtesy of: @romtoronto