Lesson Starter Name the 4 chambers in the heart Describe the purpose of valves What is the function of the aorta? What does the word pulmonary refer to?

Learning Intention To learn about the different blood vessels in the heart To learn about resting heart rate

Left and right ventricle Part of the heart Function Left and Right Atrium Collect blood Left and right ventricle Pump blood Vena Cava Carries deoxygenated blood to the heart Pulmonary Artery Carries blood from right ventricle to lungs Aorta The main artery of the body, supplying oxygenated blood to the circulatory system Pulmonary Vein Receive oxygenated blood from the lungs Valves Prevent backflow of blood

Circulation of blood through the heart Blood high in oxygen is called oxygenated blood Oxygenated blood returns from the lungs… in the pulmonary vein enters the left atrium into the left ventricle out through the aorta to the body

enters the right atrium into the right ventricle Blood low in oxygen is called deoxygenated blood. Deoxygenated blood returns from the body tissues… in the vena cava enters the right atrium into the right ventricle out through the pulmonary artery to the lungs where it picks up oxygen

Arteries Carry Blood AWAY from the heart (always oxygenated apart from the pulmonary artery which goes to the lungs) Thick elastic walls, small passageways- withstand high pressure Pulsate Deep in body- protect them

Veins Carry blood BACK to the heart (always de-oxygenated apart from the pulmonary vein which goes from the lungs to the heart) Thin walled Large internal passageways, Low pressure, – so low it needs valves One way system- valves

Capillaries Tiny Walls only one cell thick Permeable (unlike arteries and valves) Diffusion of useful substances eg gas exchange

Blood vessels and circulation (copy) Blood is carried round the body in blood vessels. There are 3 major types of blood vessel: Arteries, Capillaries, and Veins. Blood is carried AWAY from the heart in the ARTERIES at HIGH PRESSURE and is carried back to the heart in the VEINS at LOW PRESSURE. Veins have VALVES to prevent backflow of blood- ensuring that the blood is circulated one way.

Resting Heart rate(copy) Your resting heart rate (RHR) is the number of times your heart beats per minute while at complete rest. 

Pulse rate Resting rate- measure Star jumps- 2 mins After exercise – measure Measure you HR every minute after exercise until it returns to resting Before exercise After exercise Heart rate (bpm)

Why does the pulse rate increase with exercise? Think.. Why does the pulse rate increase with exercise?

Graph Using the data you have gathered; draw a graph to show your heart rate vs time after exercise