The similar thought that stuck with me was regarding the human immune system. The thought that there's a myriad of things constantly happening in the human body

The similar thought that stuck with me was regarding the human immune system. The thought that there's a myriad of things constantly happening in the human body, a continuous contest of different lifeforms, and that the immune system is the things that tries to keep on top of it all. Sometimes succeeding, sometimes failing. It really makes me think just how complex, interconnected, ever-changing everything is.