Mammal Gas Exchange

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Gas Exchange in Mammals
As majority of the mammalian population resonate on land, they get their oxygen from air. Air has a generally high oxygen level therefore is easy to ventilate, however mammals still run the risk of desiccation (drying out) so their respiratory system is which is why certain species have specific adaptations designed to reduce risk of water loss.
Mammals inhale air through the nasal cavity which then travels down a passage called the larynx and then the trachea; 2 passages that ensure strength as well as flexibility and are both lined with cartilage ring to keep the airway open, yet allow structural support when the neck is moved (varies in different mammals). This is a function similar to that of an insect. The trachea then splits off into a left and right bronchus. These bronchi are the primary tracts in the respiratory airway that conducts air in to each lung. The bronchi then split off further into finer tubes called
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The interior of the nasal cavity has adaptations that allow respiration to occur as efficiently and effectively as possible for the organism. For example, the humidity of the air when it enters the nasal cavity is increased to avoid water loss and decrease the risk of desiccation of the gas exchange surfaces as well as reducing risk of damage to lungs. This is particularly important adaptation for terrestrial organisms that live in dry habitats. Some mammals can even seal their nostrils to further reduce chance of water loss. These adaptations also protect against the entry of unwanted debris such as dust to pass through into the respiratory system. Camels for example, live in hot, dry environments. Living in a sand based environment, camels are adapted and can seal their nostrils which protects them from sand and other debris entering their nostrils which would cause potential internal
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