Heart

A heart moves blood along an artery network and, provided there are oxygenated lungs and a fed stomach on the same network, the blood oxygenates and nourishes any flesh and carapace within a certain radius of an artery.

Oxygenated and nourished blood ensures flesh and carapace retain their healing capabilities.

Requires: Electricity, oxygenated lungs and fed stomach on the same artery network