“Human” refers to our species, which is defined by our DNA.
Humans and chimps share a surprising 98.8 percent of their DNA. What so the last 1.2% defines what a human being is? You believe in the old determinism science but we have moved on from that old system more than hundred years ago. We know that more than classical mechanism operates in this physical realm, which science moved on when they discovered quantum physics. The conclusion is a human beings have a non-physical soul. Only evil people believes human beings are just a body with no soul. It is the soul that defines the human being with abilities to think rational and logical. If we were just a body clipping or nails and hair would be equal to torture because then we would lose parts of ourself, but it is the soul that is us, living in the host of our body in this physical realm. A soul can't be divided into pieces, we are whole.
Yes, learn some basic biology. Species are determined by our DNA.
Also, I never said human beings don’t have souls. Quit assuming things and putting words in my mouth.
The body is, not the soul. If the body was all we are then we would be practical apes since the DNA is almost 100% the same.