Ive recently got into finance and stuff, I see it as a science of money management. Do you want to know anything about financing? 
Yes, there are some criteria while doing finance, could you list them?
Well yes it can range from health and property insurance to even investing and saving for retirement, But financing is generally just about saving money or not spending as much at one time. 
Is there any specific condition to take health insurance other than our physical health?
Well since it usually covers the whole or a part of the risk of a person with medical expenses, Id say that its just for people who want to stay healthy and have money in case something goes wrong, it can also sometimes cover medicines and stuff. 
I have a doubt about it. If a person who could not able to spend for his medical expense can take medical insurance?
I'm not sure sorry, But you can usually get medical insurance from wellcare and other services if you live in the US and your employer usually covers medical insurance on their own. 
Oh, its very nice to hear. Thanks for your information about health insurance. It might help in future.
No problem, if you want medicare you should know that it is funded by a our taxes, premiums and surtaxes from different beneficiaries, so its not for everyone. 
Financing and money management are very important in our daily life. It would increase our life standard.