Zach+-+Circulatory+System

Human Blood Circulatory System • Another name for the Circulatory System is the Cardiovascular system • There are two different types of circulation systems o Open Circulatory system: this is for invertebrates. o Closed Circulatory system: this is for humans and vertebrates. The blood circulatory system within humans helps to maintain homeostasis by using three main vessels: • The Heart o There are things in the heart that are called arteries that bring oxygenated blood to the tissues. o Then veins bring deoxygenated blood back to the heart o Blood travels from arteries to veins to capillaries o Capillaries are the thinnest and most numerous of the blood vessels and these capillaries help to join tissue with arterioles for transportation of nutrition to the cells. o De-oxygenated blood enters the right atrium of the heart and flows into the right ventricle where it is pumped through the pulmonary arteries to the lungs. Pulmonary veins return the now oxygen-rich blood to the heart, where it enters the left atrium before flowing into the left ventricle. From the left ventricle the oxygen-rich blood is pumped out via the aorta, and on to the rest of the body. • Blood • Blood Vessels o Oxygenated blood helps maintain interior temperature by regulating pH which in-turn regulates homeostasis Heat Stress
 * Heart pumps the blood. Blood vessels transport oxygen and nutrients to the cells of all the organs and transports wastes away from them. The blood clots to prevent blood loss. The cardiovascular system also specifically helps the other systems like the muscular system. Muscle contraction is normally activated by movement. In order to be active, in the heat, for a long time, the body needs for the blood to pump quickly to get to the muscles so that they can be used in the activity. Hydration is the most critical need.