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Respiratory system of human being and mechanism of respiration

Respiratory System Introduction Red blood cells are like trucks that transport cargo on a highway system. Their cargo is Oxygen, and the highways are blood vessels. Where do red blood cells pick up their cargo of oxygen? The answer is the lungs. The lungs are organs of the respiratory system. The respiratory system is the … Read more

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Circulatory System (1)

Circulatory System The circulatory system can be compared to a system of interconnected, one-way roads that range from superhighways to back alleys. Like a Network of roads, the job of the circulatory system is to allow the transport of materials from one place to another. As described in Figure below, the materials carried … Read more