Titanium is nontoxic. why is this important in the manufacture of artificial body parts?

The answer to your question is below.

Explanation:

Titanium has that name due to the Greek Mythology. It is hard, shiny and strong metal.

Also, it is strong but less dense that some metals, so it can be used to create so prosthesis.

Titanium connects well with bone so it can be used in medicine.

It is a not toxic metal so this ensures its use in medicine and surgical applications.

not clear

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.