Alright we shall cover a little bit of ground here.
The vessels that take oxygen rich blood way from the heart to all the body parts are called arteries. Oxygen rich blood is red in colour. You can see some of them in your body. Since the blood is coming from the heart it has more pressure in arteries.
The vessels that take the oxygen deficient blood from body parts towards the heart are called veins. These are blue in colour. You can see some of them in your body. The pressure in them is not so high.
Hear itself will have them. Both arteries and veins. These are called coronary arteries and veins.
If heart does not supply blood to some body part properly then it is a heart disease.
If the heart does not properly supply blood to itself then too it is a heart disease. This latter one is called coronary heart disease.
There is a medical diagnostic technique to measure certain fat levels to assess risk of coronary heart diseases.
This is called the lipid profile.
The fats under consideration are total cholesterol, high-density lipoprotein cholesterol, low-density lipoprotein cholesterol, and triglycerides. (We suppose we should stop here!)