A cockroach has one heart, but the heart may have as 13 chambers {. It’s heart is tube shaped, And, it’s heart can STOP, without the cockroach dying. Of further interest in cockroach cardiology, if a chamber fails - it’s not a death sentence for the insect…..but it may well be for owners of our 4-chambered heart. The heart is essential for pumping oxygenated blood throughout the body & organs for all normal functioning.