The circulatory system, also called the cardiovascular system, is an organ system that permits blood to circulate and transport nutrients, oxygen, carbon dioxide and hormones to and from the cells in the body to provide nourishment and help in fighting diseases, stabilize temperature and pH, and maintain homeostasis.

The essential components of the human cardiovascular system are the heart, blood and blood vessels. It includes the pulmonary circulation, which is a blood vessel “loop” through the lungs where blood is oxygenated; and the systemic circulation, which is a blood vessle “loop” through the rest of the body to provide oxygenated blood. The systemic circulation can also be seen to function in two parts–a macrocirculation and a microcirculation. An average adult has five to six quarts (roughly 4.7 to 5.7 liters) of blood, accounting for approximately 7% of their total body weight. Blood consists of plasma, red blood cells, white blood cells, and platelets. Also, the digestive system works with the circulatory system to provide the nutrients the system needs to keep the heart pumping.

The cardiovascular systems of humans are closed, meaning that the blood never leaves the network of blood vessels. In contrast, oxygen and nutrients diffuse across the blood vessel layers and enter interstitial fluid, which carries oxygen and nutrients to the target cells, where carbon dioxide and wastes diffuse in the opposite direction.

Schizandra has the potential to boost your cardiovascular system in several ways. It is very beneficial to your lungs and will greatly enhance pulmonary circulation. It has even been taken for asthma complaints. Not only does schizandra help with good blood flow but will help your body maintain healthy levels of blood sugar and blood pressure, as well as lower your cholesterol. It has been used to ease coughing and increase energy and endurance, making it quite the powerful supplement for people with upper respiratory issues, such as asthma.