Cardiovascular and respiratory system

The heart acts as the central pump in the human ‘central heating system’. It pumps blood to the body organs, tissues and muscles through the arteries and veins. The heart, lungs, veins and arteries, all under the control of the autonomic nervous system make up the cardiovascular system. Normally, the heart rate is dictated by the body’s needs. When at rest, the tissues, muscles and organs require fewer amounts of blood and oxygen and therefore there is a reduction in the pressure of the blood thus slowing down the heart rate. When active, the tissues, muscles and organs require an increased supply of oxygen and blood thus higher blood pressure, heart rate increase and more respirations. This response is usually involuntary and normal. (Your Heart’s Electrical System, 2012) Just like a regular pump, the heart needs energy and a power source.

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