It's human tissue just like a cancerous growth.
Depending on the stage where it is removed, it may have less or more organs, but isn't considered living being due to the absence of a heartbeat and brain. Chimeric tissue also has it's own DNA print, but isn't considered another individual.
I'm an Atheist for a very good reason. One of the best reasons for that is the the supposed plan of god to give children cancer, birth defects that only allow the child to live for a very limited time (thanks to anti abortion laws women cannot terminate the pregnancy and will have to live through terrible tragedy after birth) and letting the absolute worst possible parents have children (even more now because of those fucking anti abortion laws).