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Ventilation system – system consists of the lungs – airways that bring air in and out of the lungs from the atmosphere and the muscles that are used to move the air in and out – air enters through the nose or mouth – then passes down the TRACHEA – rings of cartilage in its […]
October 18, 2013
GAS EXCHANGE: absorb one gas from the environment and relase nother one – Humans absorb oxygen from the air and transport it to all living cells ( – Cell respiration is then possible and CO2 is produced – CO2 produced in cell respiration and is carried by blood to the lungs, where it is released […]
October 18, 2013
Control of heart beat – contraction is called myogenic (no nerve stimulation involved, muscle itself stimulates it) – If one heart muscle cell contracts it stimulates any other cells that it is touching so they also contract – region of the heart that sets the overall pace of contraction is the PACEMAKER (small group of […]
October 16, 2013
1) 0 to 0.1 seconds 2) 0.1 seconds 3) 0.1 seconds: ventricular pressure is higher than atrial pressure 4) 0.15: ventricular pressure is higher than arterial pressure 5) 0.4: ventricular pressure lowers (lower than arterial pressure) 6) 0.15 to 0.4 7a) 0.1 seconds (before the valve opens) 7b) 0.35 seconds: when ventricle pressure is maximum
Alisa's Blog 
October 18, 2013
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