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Biology Chapter 1.1 Gaseous exchange in mammals

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Gaseous Exchange System - Quick A Level Biology Revision

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Gaseous Exchange System. AS Biology. OCR Exam Board - Module 3. The "You need to know..." section has come from the OCR specification.

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Most mammalian lungs have the same basic structure. The Trachea (windpipe) leads from the mouth and nose and splits into the Bronchi which in turn split into the Bronchioles which lead to the Alveoli (air sacs) where gaseous exchange occurs.

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Gas Exchange in Humans | S-cool, the revision website

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The gas exchange surface of a mammal is the alveolus. There are numerous alveoli - air sacs, supplied with gases via a system of tubes (trachea, splitting into two bronchi - one for each lung - and numerous bronchioles) connected to the outside by the mouth and nose.