english: And they're scientific models? (Laughs) As you might have guessed, I'm a tissue engineer, and this is a video of some of the beating heart that I've engineered in the lab.
non_english: I da su to naučni modeli? (Smeh) Verovatno ste već shvatili  da se bavim inženjeringom tkiva, a ovo je video snimak srca koje kuca, proizvela sam ga u laboratoriji.