Question

Human skin cannot function as a respiratory organ because: a) It is not permeable to O₂ and CO₂ b) It is too thick c) It is too dry d) All of the above

Answer 1

Human skin cannot function as a respiratory organ because it has d) All of the above

Characteristics of a respiratory organ

• A respiratory organ must have a large surface area so that oxygen and other gases can be easily exchanged through the surface because gaseous molecules randomly and have high kinetic energy.

• The surface layer of the respiratory organ should also be thin enough to ease the diffusion of the gases.

• The organ should have a sufficient supply of blood or fluid to transmit the gases throughout the body tissues.

Since skin does not possess all of these characteristics. Therefore, it can not function as a respiratory organ in the human body.

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