Anatomy of a living, tree-based spaceship - What's it made from?

I've always liked living spaceships, but it seems to me that the animal kingdom would make far inferior spaceships to the plant kingdom. With that in mind, what does this tree-ship have to be made from to:

1. Survive space itself.
2. Let humans live in interior passages.

Ignore everything else about trees in space (nutrients, air, etc.).

I'm only interested in the chemical makeup of the tree that will let it and its passengers survive things like extreme radiation and (in the case of the passengers) vacuum.

If it helps when thinking about it, these trees evolved on a normal Earth-like planet, and were bioengineered to survive in space.

posted over 7 years ago

Azuaron‭

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