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13 Cards in this Set
- Front
- Back
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Respiration 1 |
Air enters through your mouth and nose |
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Respiration 2 |
Air moves down the windpipe (trachea). |
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Respiration 3 |
Air moves down a bronchus |
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Respiration 4 |
Air moves through a bronchiole |
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Respiration 5 |
Air moves into an alveolus |
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Respiration 6 |
Oxygen diffuses into the blood cells |
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Breathing in |
The diaphragm is pulled down and muscles pull the ribs up and out. The volume of the chest is increased and the pressure in the lungs are lowered. Air equalises the pressure of the lungs to the air outside of the body. |
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Breathing out |
The diaphragm moves up and the ribs are pushed down and out by muscles. The chest volume is now smaller and the pressure in the lungs are higher than the air outside the body. Air leaving the lungs equalises the pressure. |
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Plants gaseous exchange |
Plants have stomata on the bottom of the leaf. They are open during the day to let oxygen and water out and CO2 in but close at night as the plant is not photosynthesising. |
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Leave layers - top |
The top of the leaf is a waxy layer to stop water loss. |
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Leave layers - under the top |
Palisade cells are underneath the waxy layer. They contain chloroplast for phosotsynthesis. |
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Leave layers - the layer under the layer under the top |
The next layer is made of mesophyll cells and have gaps between cells for gas exchange. |
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Leave layers - the last layer |
On the bottom of the leaf is stomata surrounded by guard cells which open and close for gaseous exchange. |
