*In '''Cattle''' the Mediastinum is a tough membrane, in contrast to '''Horses, Dogs''' and '''Cats''' where it is rather thin and more delicate.
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*In '''Cattle''' the [[Mediastinum - Anatomy & Physiology|Mediastinum]] is a tough membrane, in contrast to '''Horses, Dogs''' and '''Cats''' where it is rather thin and more delicate.
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*Birds do not have a pleural cavity as their lungs do not have the capacity to inflate.
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*Birds do not have a pleural cavity as [[Avian Respiration - Anatomy & Physiology|Avian lungs]] do not have the capacity to inflate.