The American Red Cross explains that a single pint of donated blood can help as many as three individuals in a health crisis. The need for donated blood is generally continuous and increases in the event of a natural disaster.

Endurance exercise, such as jogging, swimming and cycling, increases your blood volume over time. Blood-volume adaptations begin after a single bout of exercise and amplify within weeks of training. Enhanced blood volume enhances your exercise performance and cardiovascular fitness.

Blood is a highly specialized form of connective tissue composed of several cellular elements and a fluid element. The cellular elements of blood determine its categorization as red or white blood cells, or as platelets. The fluid element is known as blood plasma.

Thrombocytopenia is the term used to describe a low platelet count. Platelets are blood cells responsible for clotting blood and preventing excessive bleeding.

A high blood sugar level due to diabetes or other situations can cause a variety of symptoms such as dizziness, and it can even lead to blindness, nerve damage, heart disease and other chronic problems. Morning can be a common time for high blood sugar levels.

White blood cells, or WBC, are produced in the bone marrow and are the disease-fighting cells of the body. According to MedLinePlus, a low WBC count, also called leukopenia or neutropenia, is when the concentration of white blood cells in the body are less than 4,500 cells per microliter of blood.

If you have or are at risk for diabetes it is important to control your blood sugar levels through diet and exercise. Different foods affect blood sugar levels differently and each person with diabetes has unique responses to food.

If you have diabetes or are prediabetic, your doctor has probably advised you to watch your sugar and simple carbohydrate intake. Eliminating soft drinks and juice is a simple way to reduce both of these from your diet. Unsweetened tea can be a satisfying option because it doesn't contain any sugar or carbohydrates.

"Eat Right for Your Type," the diet plan and popular book by Peter D'Adamo, a naturopathic physician, recommends people eat according to their blood type. An intriguing approach to food prescriptions, Dr. D’Adamo claims that following his plan is the key to controlling weight and preventing illness.

The immune system employs several tactics to protect the body. Phagocytosis is one such tactic wherein special types of cells called phagocytes ingest and kill invading organisms. Phagocytes also ingest dead cells and debris caused by tissue injury.

Also known as water pills, diuretics are medications designed to stimulate diuresis, which helps your body release water and salts via your urine.

Diabetes causes higher-than-normal blood sugar levels, which can damage small blood vessels in the eye. Many people with diabetes suffer vision complications that develop slowly over the course of their disease.