Anemia is caused by have a low red blood cell count. Red blood cells, or RBCs, contain a protein called hemoglobin, which carries oxygen to the different tissues of the body. The amount of oxygen that is supplied to the different tissues depends on the amount of RBCs present in the body.

When you exercise, it is important to keep an eye on your heart rate and blood pressure. A change in either one may say a lot about your heart health. Exercise naturally increases blood pressure because your heart is working harder. It is not typical for blood pressure to fall after you are done exercising.

A burning sensation accompanied by chest pain can be a symptom of many diseases or conditions. Some may be related to the heart, and others may be caused by the digestive system or neurological responses within the chest cavity.

High blood pressure puts you at risk for developing heart disease as well as other serious health conditions including kidney disease, memory loss, vision impairment, angina and fluid in your lungs. Losing weight, reducing sodium in your diet and adding potassium and fiber can help lower your blood pressure.

Heart failure refers to the condition of your heart when it does not pump as well as it should, according to the American Heart Association. Because your cells and tissues cannot get enough blood, many everyday activities become difficult.

You can greatly reduce cholesterol levels by simply changing your diet and knowing the right foods to eat. Daily exercise also helps to reduce cholesterol. Lowering your LDL, or bad, cholesterol levels reduces the risk of plaque build-up in the arteries.

Sinus mucus becomes troublesome if it gets sticky and thick. Thickened mucus can stop up your eustachian tubes -- the tube between your ears and your nose -- causing ear infection. In addition, it can also block up your sinuses, causing sinus infection and headaches.

Serotonin is a neurotransmitter that has numerous physiological functions in the central nervous system. It is made from l-tryptophan, an essential amino acid found in many protein foods.

One of the main functions of the heart and blood vessels is to supply the body with oxygenated, nutrient-rich blood. The ability of the heart to pump blood out to the body, called cardiac output or stroke volume, is determined by three characteristics, according to the University of Virginia School of Medicine.

Smoking damages your body and good health in numerous ways. In addition to the adverse health effects on the smoker, smoking harms a fetus and the people around a smoker. The cost of smoking in terms of health-care resources and other economic costs cannot be underestimated.

Vasoconstrictor drugs cause contraction of muscle cells in the walls of blood vessels, narrowing their internal diameter and raising blood pressure. This effect makes these medications useful for the treatment of low blood pressure, typically in an intensive care or surgical setting.

Lowering your sodium intake may help lower high blood pressure, according to the Joint National Committee on Prevention, Detection, Evaluation and Treatment of High Blood Pressure. The recommended sodium intake is no more than 2,300 mg per day, but most Americans exceed that amount.