A-Level Biology OCR A
Specialised Transport Lots Food Waste Diffusion Distances Transported
| Front |
State 5 reasons why most animals need specialised transport systems. |
| Back |
Need for specialised transport systems in animals:- High metabolic demands - lots of oxygen and food required and lots of waste products, diffusion over long distances is not enough
- Low surface area to volume ratio - as orgs get bigger, diffusion distances get bigger and amount of SA available to absorb/remove substances gets relatively smaller
- Hormones/Enzymes are made in one place but needed in another
- Food digested in one organ system then needs toe transported to every cell for respiration & other uses
- Waste products need to be removed from cells and transported to excretory organs
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A-Level Biology OCR A