We take over the Operation Ouch! lab in this fun science lesson ... Dr. Ronke Ikharia (Dr. Ronx) also joins us to explore the circulatory system, the most reliable delivery service in the world!

Fish have a circulatory systems with just one circuit. Their hearts pump oxygen poor blood ... system. I mean, look at me, I've got so much energy and oxygen I can do aerobatics. Ouch.