When you aren't competent to take responsibility for your Choice, then you don't have the right to exercise it.
Does that apply to voting as well?
Technically, no, your arm is not a living thing, it is a part of a larger living thing
Is your arm a thing? Is it living or dead? "
It's a living thing. It's a terrible thing to lose."
When it ceases being a living thing, it needs to be amputated.
It is the ethical and legal definitions of when personhood begins that we run into disagreements
Irrelevant in my moral calculus. Go ahead and call a fetus a person. For me, the morality or the immorality of abortion doesn't depend on whether anybody thinks a fetus is a person or not. Or human. It's only based on the fetus' experience being aborted, which I presume is about the same as the arm's experience being amputated, given that neither has a nervous system capable of experiencing suffering..
A fetus, however, is its own independently functioning biological system
Then it should do fine one removed from the womb, perhaps by Caesarian sectioning.
but from conception on, embryos/zygotes/fetuses engage in their own metabolic, growth and homeostatic processes that are not governed by the mother's biological systems
How is that relevant to the moral status of abortion? That simply means that they are alive. Does that alone make its abortion immoral?
Also, isn't this true for an ear of corn still on the stalk as well? Is that fact relevant to the moral status of killing an ear of corn? It is, after all, a living thing that grows, develops, metabolizes, etc,. until one kills it.
Incidentally, like a healthy arm, it is a living thing as well - until shortly after you pick it.