Movement and Exchange of Gases In The Human Body (3)

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Movement and Exchange of Gases In The Human Body (3)

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The importance of thickness of the walls of alveolus and blood capillaries (2)

This structure facilitates and increases the rate of diffusion of gases across the walls of the alveolus and blood capillaries

The importance of moist wall of alveolus

The moist wall of alveolus allows respiratory gases to dissolve and diffuse into the blood capillaries

The importance of surface area of alveolus

The lungs contain millions of alveoli which provide a large surface area for the exchange of gases

The importance of network of capillaries covering the alveolus

The alveolus is covered by a compact network of capillaries which increases the rate of gaseous exchange between the alveolus and the blood capillaries

Adaptations that influence the efficiency of the alveolus to maximise the exchange of gases in the body (1)

The thickness of the wall of the alveolus and blood capillaries is as thick as one cell

Adaptations that influence the efficiency of the alveolus to maximise the exchange of gases in the body (2)

Alveolar wall moisture is high

Adaptations that influence the efficiency of the alveolus to maximise the exchange of gases in the body (3)

Large alveolar surface area

Adaptations that influence the efficiency of the alveolus to maximise the exchange of gases in the body (4)

A dense capillary network covers the alveolus

Factor that can increase the exchange of gases in the human body (1)

Alveolar structure

Factor that can increase the exchange of gases in the human body (2)

The difference in concentration of gases in the alveoli and blood capillaries

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