An internal organ if that's what you mean.
The type of model you would use to represent your human heart would be a physical model.
Not if you're a human. The human heart has four chambers. If you are a reptile or an amphibian then yes, it would be normal to have three chambers in your heart.
If every human didn't have a heart, all humans would be dead except for animals. BTW, this is a stupid question.
I think that would be human geography?
organ
an organ
artery
blood
Bone is classified as an organ in the human body.
Without a heart pumping blood throughout the body, a person would die.
Never... The heart of a pig would not function correctly in a human.
YES, of course it's important! The human body couldn't function right without a heart. That's how important it is. Without our heart, there would be no blood circulating althroughout our body.