Bone

Bone is an organic shipbuilding material, and the literal backbone of an organic ship. It is produced in a bone crèche, a specialized organ.

Periodically, a bone crèche supplied with oxygenated, nutrient-rich blood will complete a bone, which may be removed by a player character or clone and grafted into the ship. There, the bone will permit flesh to grow in the vicinity of the bone. With enough bones, and nearby arteries connected to a heart, oxygenated lungs, and fed stomach, flesh will grow to fill the interstitial spaces between bones. In this way, an organic ship grows and becomes a sealed vessel.