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Cardiovascular » “Cardio-” = heart » “-vascular” = vessel Function » Transport materials needed by cells » Oxygen » Glucose » Remove waste materials from cells » Carbon dioxide » urea » Pump (heart) » Continuously circulates blood Major Components The Heart The Blood The Blood Vessels THE HEART • The heart is the most vital organ in the circulatory system. • About the size of your fist. • It is made up of four main parts called chambers. • Left and right ventricle • Left and right atrium THE BLOOD VESSELS • The blood vessels provide the pathway in which blood travels. • There are three types of blood vessels: • Arteries- direct blood away from heart. • Capillaries-very thin! Allow nutrients, oxygen to diffuses easily through capillary walls. • Veins- blood vessels that direct blood back to the heart. THE BLOOD » Platelets » Clump together in damaged area of skin to help reduce blood loss. » Red Blood Cells » carries hemoglobin (Gives cells their red color) » Hemoglobin clings to oxygen and transports it through the body. » Blue Blood Cells » carries waste » White Blood Cells » Release antibodies that destroy pathogens and clean wounds Mmmm….Blood!!! How everything works together… » Your blood carries oxygen & nutrients to all the cells in your body. » It also carries away the waste products like carbon dioxide. » The left side of the heart pumps oxygenated blood to the body. » The right side of the heart pumps deoxygenated blood to the lungs where oxygen can be absorbed by the hemoglobin carrying red blood cells. Movie time! What is Blood Pressure? » Is a measure of the force exerted by the blood on the wall of the arteries. » An example is 120/80 (systolic pressure/diastolic pressure. » Systolic pressure is the result of the contraction of the ventricles (normal 110-140) » Diastolic pressure is during the ventricle relaxation (normal 70-90) funny youtube blood pressure movie Blood Pressure Movie The End Be good to your heart!