Atrificial Heart Inspired by Cockroaches

Cockroaches have multi-chambered hearts shaped like tubes that are much more resistant to failure than human hearts. The chambers are organized sequentially, each one pushing blood into the next, until the ideal output pressure is reached in the last chamber. Due to this setup, a single chamber failure in a cockroach heart is not cataclysmic to the organ; It can continue beating, but with less efficiency.
A team of biomedical engineers out of the Indian Institute of Technology, Kharagpur (IITK), have developed a new artificial heart, modeled after this muti-chamber idea. But instead of shaping the heart as a tube, they've created the chambers in a series of concentric spheres like an onion.