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Ventilation means moving air into and out of the lungs. This depends on a number of factors which we can break down and talk about individually.

The structure of the thorax: An airtight space in th...

So one thing I observed in my Biology class was that students would memorise every single piece of inforrmation about each biological process that was written on their 'comprehensive flashcards'. One thin...

As each O2 molecule binds to the haemoglobin, it alters the shape of the protein --> making subsequent binding more favourable. Therefore the affininity for oxygen will be greater in places with a high...

This is a really common question that people ask actually and I struggled with this when I did GCSE. It's a good idea to jot down the points you want to include whilst you're learning how to answer these ...

To expand the lungs and fill them with air, thoracic pressure decreases. This is done by the diaphragm contracting and flattening out and the external intercostal muscles raising the ribcage upwards and o...