The human body

“Often, if you come across something in the body that seems like a big deal, you think, ‘Why didn’t anybody check this before?’ But the more you learn, the more you realize that we’re just scratching on the surface of life. We don’t know the whole story about anything.” - Dr. Matthias Nahrendorf, Harvard Medical School.
I can't comprehend the human body as an accident of nature or a freakish event that blossomed from some primordial soup. The body is much too complex. We think we know so much about the body but we don't even know what the spleen is for. Even professors at Harvard don't know about the spleen. How can such a complex system that we know so little about be created by accident?
If we don't know what the spleen is for or how it works, what about the brain?
Just look at your thumb. Move it, wiggle it. It's amazing. How did that come about. Through an accident? I doubt it? It's much too organized and complex.
It's too far fetched for me to believe in accidental human creation. It would take more faith for me to believe in pure human evolution (i.e., that man evolved from an accidental collision of proteins in a soup over billions of years) than it does for me to believe in divine creation.
There is a place for evolution, but when it's taken too far I can't believe in it.