Circulatory System The Circulatory system serves 3 main functions: Delivers needed substances to cells Carries wastes away from cells Helps regulate body temperature It also contains blood cells that fight disease

Coronary Circulatory Coronary means “heart” Flow of blood to and from the tissues of the heart

Coronary Circulatory

Pulmonary Circulation Pulmonary means “lungs” Flow of blood thru the heart to the lungs and back to the heart

Systemic Circulation Oxygen-rich blood flows to all organs and body tissues except heart and lungs O2 poor blood to heart

Blood Flow Blood high in CO2 and low in O2 returns from the body to the heart 1st it enters the right atrium through the superior and inferior vena cava

Next, the Right Atrium contracts forcing blood into the Right Ventricle

The Right ventricle contracts and blood leaves the heart through the pulmonary artery to the lungs.

Oxygen rich blood travels from the lungs thru the pulmonary vein into the left atrium

Left atrium contracts forcing blood into left ventricle

Oxygen rich blood flows to all parts of your body through the Aorta https://www.youtube.com/watch?v =BEWjOCVEN7M

Veins and Arteries Pulmonary arteries carry oxygen poor blood from the heart to the lungs Pulmonary veins carry oxygen rich blood from the lungs to the heart Veins: blood vessels carrying blood back to the heart Arteries: Blood vessels that carry blood away from the heart