(a) Write one difference between respiration in plants and respiration in animals. b) How are lungs designed to maximize exchange of gases? (c) ‘While breathing cycle is rhythmic, exchange of gases is a continuous process.’ Justify. (d) The respiratory disorder in which inflammation of air sacs in lungs takes place is called:
Answers
1 Plants do not breathe, they only respire through their leaves. Animals breathe air for cellular respiration. Carbon dioxide released during respiration is utilized by plants for the photosynthesis process. Carbon dioxide released during respiration is not utilized by animals; it is released outside the body.
2 In humans, a pair of lungs are designed in such a way that they are lined by a thin membrane, the smaller tubes called bronchioles a balloon-like structure called alveoli and a network of blood capillaries increase the surface area for the exchange of gases.
3 Breathing Cycle is a rhythmic process because contraction and relaxation of our chest takes place during breathing, But exchange of gases is a continuous process because it never stops it takes place all the time.
4 Emphysema is a condition that involves damage to the walls of the air sacs (alveoli) of the lung.
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Answer:
1 Plants do not breathe, they only respire through their leaves. Animals breathe air for cellular respiration. Carbon dioxide released during respiration is utilized by plants for the photosynthesis process. Carbon dioxide released during respiration is not utilized by animals; it is released outside the body.
2 In humans, a pair of lungs are designed in such a way that they are lined by a thin membrane, the smaller tubes called bronchioles a balloon-like structure called alveoli and a network of blood capillaries increase the surface area for the exchange of gases.
3 Breathing Cycle is a rhythmic process because contraction and relaxation of our chest takes place during breathing, But exchange of gases is a continuous process because it never stops it takes place all the time.
4 Emphysema is a condition that involves damage to the walls of the air sacs (alveoli) of the lung.
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