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16 Cards in this Set
- Front
- Back
The first structure air passes through in the respiratory tract
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the mouth or nasal caviety
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The second structure of the respiratoy tract
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pharynx
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the third structure of the respiratory tract
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larynx (voice box)
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the fourth structure of the RT
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trachea (windpipe)
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the fifth structure of the RT
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bronchi and bronchioles
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The last structure of the RT
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Alveoli (one cell thick)
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The structure of hemoglobin
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- contains four polypeptide chains and four heme groups
- each heme group contains an iron atom |
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How does the exchange of oxgen and carbon dixiode occure
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oxygen and carbon dixoide exchange by passive diffusion
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In the lungs
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oxygen exitse the alveoli to enter red blood cells in the lung capillaries
- blood returns to the heart then travels to other body cells - carbon dixoide exists the lung capillarite to enter alveoli and is exhaled |
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how do the gasas exchange at tissue level
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oxygen departs from the tissue capillaries to enter body cell
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The brain parts which contain respiratory rate and depth
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-nerves connect the pons and the medulla in the brain stem to the muscles of the ribs and the diaphram
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What does smoking do to the respiratory system?
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It errodes the cilia in the bronchi and the bronchi irreversibly narrows
- delicate alveolia are destroyed so it becomes harder to gain oxygen and release carbon dioxide (this is called permant emphasema) |
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what is the counter current flow mechanism
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a mechanism which allows fish to breath in water.
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How do birds absorb enough oxygen
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their air sacs allow fresh air to flow into the lungs on both inspiration and experation.
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insects breath
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thourgh the numerous tiny tracheas in thier skin, which branch to reach fluid around body cells
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Earth worms breath by
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absorbing oxygen through thier most body sufaces which diffuses into cells and the co2 exits back out through the skin
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