CIRCULATORY SYSTEM Year 11 PDHPE

Diagram of the heart   Task: Colour and label your own diagram of the heart

Structure of the heart Task: Account for the difference in thickness of the right as compared to the left chamber of the heart.

BLOOD FLOW Go to the following link. http://childrensheartinstitute.org/educate/hea rtwrk/blodflw2.htm Watch the slide show which demonstrates blood flow to and from the heart. Task: Outline the function of each of the following cardiac structures: Inferior vena cava, superior vena cava, right atrium, left atrium, pulmonary artery, pulmonary vein, right ventricle, left ventricle, aorta, carotid artery, septum.

Blue blood becomes Red blood How the Heart Works: How Blue Blood Becomes Red

As the blue blood flows through the main pulmonary artery to the lungs the pulmonary artery branches to smaller and smaller pulmonary arteries and then those branch into very tiny blood vessels called capillaries. The capillaries come around and encircle the walls of the air sacs (alveoli). The alveoli contain high oxygen content and low carbon dioxide content. The blue blood contains low oxygen content and high carbon dioxide content. At the surface of contact with the alveoli, the blue blood releases its carbon dioxide to the air sac and gets oxygen from it and becomes red.

Arteries, Veins and Capillaries Complete Comparison of blood vessels handout What Is an Artery? An artery is an elastic blood vessel that transports blood away from the heart. There are two main types of arteries: pulmonary arteries and systemic arteries. Additional Notes: What Is a Vein? A vein is an elastic blood vessel that transports blood from various regions of the body to the heart. Additional Notes

Arteries, Veins and Capillaries What Is a Capillary? A capillary is an extremely small blood vessel located within the tissues of the body, that transports blood from arteries to veins. Additional Notes:

Arteries

Capillaries

Systemic and Pulmonary Circulation Systemic Circulation: Is the part of the cardiovascular system which carries oxygenated blood away from the heart to the body, and returns deoxygenated blood back to the heart. Pulmonary Circulation: Is the portion of the cardiovascular system which carries oxygen-depleted blood away from the heart, to the lungs, and returns oxygenated blood back to the heart.

Activity Define; Hypertension Blood Pressure Systolic and Diastolic pressure Sphygmomanometer Atherosclerosis Give examples of high and low blood pressure and explain the readings.