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What is respiration?
Respiration is a chemical reaction that happens in all living cells. It is the way that energy is released from glucose, for our cells to use to keep us functioning.
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What two substances are needed for respiration?
Glucose and Oxygen.
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What products are produced by respiration?
Water and carbon dioxide.
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What is the equation for aerobic respiration.
glucose + oxygen --> carbon dioxide + water
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What is glucose and where do we obtain this from?
Glucose is a type of carbohydrate, obtained through digestion of the food we eat.
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In what part of the lung does gas exchange take place? (Taking oxygen from the air and removing carbon dioxide from the blood).
Alveoli
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Describe some features of the alveoli that allow diffusion to take place easily.
- They give the lungs a really big surface area
- They have moist, thin walls (just one cell thick)
- They have a lot of tiny blood vessels called capillaries.
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What are tiny blood vessels called?
Capillaries.
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What is diffusion?
The movement of particles from a high concentration to a low concentration.
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How is glucose transported around the body?
It is dissolved in blood plasma, the pale yellow liquid part of our blood.
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How is oxygen transported around the body?
They are carried by the red blood cells attached to haemoglobin.
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How is carbon dioxide transported around the body?
It is dissolved in blood plasma, the pale yellow part of our blood.
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What is breathing or ventilation?
The movements of the ribs, rib muscles and diaphragm allowing air into and out of the lungs.
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What is the tube called that connects the lungs to the outside of the body?
Trachea or windpipe
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What parts of the body does oxygen from the air have to pass through to reach the blood?
Trachea, bronchus, bronchiole, alveoli
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What parts of the body does carbon dioxide have to pass through to get outside the body?
blood stream, alveoli, bronchiole, bronchus, trachea
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