But if we take the substances of which the heart and brain ... demonstrated to be so by the artificial production of many organic constituents outside of either plants or animals in the laboratory ...

An organic substance is not the same as a "natural" substance. A natural material means that it is essentially the same as it was found in nature, but "organic" means that it is carbon based.

Mitsotakis warns era of outsourcing EU security to US is over ...

Soil samples collected from the asteroid Ryugu by Japan's Hayabusa 2 space probe contain organic substances, a discovery that will likely provide clues to the origin of life on Earth, according to ...