Transport Notes
Subject:
Biology [1]
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Biology Notes [10]
Biology Form 5 Chapter 10 Transport Notes 1. Organisms that are small in size have a large total surface area to volume (TSA/V) ratio, while large organisms have a small TSA/V ratio. Hence, the rate of diffusion is higher in a small size organisms than the large ones. 2. Unicellular organisms may obtain their nutrients and oxygen by diffusion alone but multicellular organisms are more complex and bigger in size. Thus, they need a specialised transport system to transport the nutrients and oxygen to the body cells. 3. The three components of circulatory system in human and animals are the blood (medium), blood vessels (vessels) and the heart (pump). 4. The human blood consists of plasma and blood cells.