Physical model.:)
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.
There are multiple objects you can use to build a heart model, although building an actual heart is currently impossible. You can use a bucket and different sizes on tubing to represent arteries, use plastic tube endings as valves. Building a hart takes a lot of work. However I would suggest a website called sciencebuddies.org, there you should be able to find more detailed information on how to build a heart model.
If every human didn't have a heart, all humans would be dead except for animals. BTW, this is a stupid question.
parasitism
graphical
When I made a model of a cell, I used MODEL MAGIC clay for the cell wall.
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.
An internal organ if that's what you mean.
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.
You think probable to the chemical symbol of an element.