Cholesterol is a type of fat, or lipid, that naturally occurs in a child’s bloodstream and is produced primarily by the liver. Cholesterol levels in children can be influenced by a number of factors, including age, gender, ethnicity and a child's diet.

Plaque is a hard substance that forms and grows inside arteries, causing blood vessels to become clogged and hardened. Arterial plaque formation often leads to heart attacks and strokes by slowly cutting off the blood supply to vital organs.

Nutritional recommendations of the U.S. Department of Agriculture and the Institute of Medicine are based on gender and age. As a 37-year-old woman, your nutritional needs are different from men your age and women of other age groups.

Congenital diseases refer to diseases that are present at birth. Sometimes, the congenital condition affects a certain body part or is an inherited condition that affects growth and development.

A doctor who specializes in issues of the heart is called a cardiologist. According to the American College of Cardiology, cardiologists are trained to find, treat and help prevent diseases that attack the blood vessels and the heart.

Three-vessel coronary disease describes problems with three different coronary arteries. The coronary arteries are essential because they supply blood to the heart; problems with these arteries can disrupt blood flow to the heart, which can be dangerous.

Plaque in the arteries, also known as atherosclerosis, is a medical condition in which cholesterol (a fatty substance floating in your blood) builds up and forms plaque in your blood vessels. This decreases blood flow in your body and can lead to serious medical conditions like a heart attack or stroke.

Atherosclerosis, more commonly known as hardening of the arteries, is a condition in which plaque builds up in the walls of your arteries. Plaque deposits narrow the arteries, which can eventually become blocked and restrict blood flow. In some cases, plaque in your arteries can lead to a stroke.

A bacterium is a microscopic germ that can create human disease. According to the U.S. Centers for Disease Control and Prevention, over 160,000 people die due to infectious diseases, many caused by bacterial infections. People are exposed to numerous types of bacteria every day.

Plaque, a buildup of low-density lipoprotein (the so-called “bad” cholesterol), white blood cells, calcium and debris on the inside of the arteries, can lead to heart attack and stroke.

If your thyroid is underactive, there is a good chance you have Hashimoto disease. This disorder is the most common cause of an underactive thyroid -- called hypothyroidism -- in the United States, according to the National Institute of Diabetes and Digestive and Kidney Diseases.