Topic 3

ORGANISMS EXCHANGE SUBSTANCES WITH THE ENVIRONMENT

PRESENTATIONS

In this topic, you focus on the movement of substances into, out of and within an organism. With the movement in and out of organisms, the key is to focus on how surface area, concentration gradients and distance for movement applies to each organ understudy: leaves in plants, the tracheal system in insects, gills in fish and the lungs and small intestine in mammals. With the movement within organisms, there are three different concepts and organ systems to become familiar with: the cohesion-tension theory in xylem, translocation on phloem and the movement of blood in the circulatory system.


INSTRUCTIONS

The worksheets are all in Google Docs format. Click the link, click 'file' and then select either 'Add to my Drive' (if you're logged into a Google account) or 'Download as Microsoft Word' (if you're not).

3.3.1 Surface area to volume ratio
3.3.3 Digestion and absorption
3.3.2 Gas exchenge
3.3.4.1 Mass transport in animals
3.3.4.2 Mass transport in plants
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