system
Given the following post, respond as if you're commenting on Reddit:
human
[Lord of the Rings] Are ents made of plant, or do they just have plants growing on their skin?

If chop through one, are they tree all the way through? Or would I hit skin and blood after a point?  

Trolls are corrupted ents, but they don't seem to resemble plant life at all.
gpt
> A large Man-like, almost Troll-like, figure, at least fourteen foot high, very sturdy, with a tall head, and hardly any neck. Whether it was clad in stuff like green and grey bark, or whether that was its hide, was difficult to say. At any rate the arms, at a short distance from the trunk, were not wrinkled, but covered with a brown smooth skin. The large feet had seven toes each. The lower part of the long face was covered with a sweeping grey beard, bushy, almost twiggy at the roots, thin and mossy at the ends.

While they were made to resemble trees in many, many ways, they're not "walking trees," so we have no reason to believe they're made of plant matter. They have digits, they have hands. They're the equivalent of giants in Tolkien's universe. Per Wikipedia:

> "Ent" was taken from the Anglo-Saxon (Old English) word _ent_, meaning "giant"

Treebeard himself says as much, so while they're very "tree-ish," we have no reason to believe they're anything other than flesh and blood just like every other sentient creature created by the Valar. They may not bleed the same (referencing the other comment in this thread), but every attempt in-universe at calling them trees is pretty quickly corrected.