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There’s the cardiac muscle, which is very special. Other muscles have cramps when it’s worn out or have anaerobic respiration (doesn't have enough oxygen). 1) The structure of the heart: the position of the two atriums (left and right) and two ventricles (left and right). The septum (separating the heart in two halves) on the diagram as well. 4 major arteries and veins coming from the heart. Atriums are larger than ventricles. A valve is something that allows fluids to move in just one way. 2) A diagram of the circulation path around the human body showing the pulmonary circuit. One loop goes to the lungs and back to the heart. The same blood goes to the rest of the body. We have 4 rooms/chambers in the heart. Right atrium brings the blood from the body, which goes to the right ventricle. Then, it goes to the pulmonary circuit and into the lungs. Then, it goes to the left atrium and goes to the left ventricle. Next, the left ventricle sends the blood to the body. The blood was pumped into the capillaries, and then the capillaries leak out the blood. Then, blood from the body goes to the right atrium. That’s the idea of the figure 8. Atriums and the ventricles are the 2 beats our heart makes. Atriums beat louder/harder than the ventricles. 3) A capillary bed, a vein which contains the blue blood (dioxinated) goes into the heart and arteries take blood away from the heart. Capillary beds surround the heart. It supplies a lot of blood and it’s coming from the lungs. Capillary means that the tube is so thin that pressure and force doesn’t work so well inside it. Veins will leak blood because there are capillaries in the veins. Blood is under the pressure from the heart into the capillaries, but there’s no pressure inside the capillaries. Veins have valves while the arteries don’t. Arteries are under pressure though. How is blood maintained? Double beats, atriums and ventricles, pressure and no pressure. How does the heart beat? Medulla oblongata sends the heart when we exercise to beat faster, but not every second. The heart controls its own beat/rhythm. A heart murmur is when a heart isn’t right and it’s dangerous. Node means a point. A node in the heart muscle. A sinoatrial node. Pace maker is an electron device that can shock the heart and it helps the beating of a murmured heart. 1) Draw the structure of the heart – septum, left and right ventricles, left and right atrium 2) Figure 8 – map or write out the direction that blood flows: 3) Draw the capillary bed surrounding the muscle showing what’s diffusing in (oxygen) and what’s diffusing out. Draw the capillary bed surrounding the lungs (putting in oxygen into the capillaries)