2. Mass transport This allows the efficient supply of materials over large distances. It takes the form of a transport system.

3. Pg 184: Features of a transport system: A suitable medium to carry materials e.g. blood A form of mass flow to transport the medium over large distances A closed system of vessels A mechanism for moving the transport medium and in one direction A mechanism of controlling the flow depending on the organisms needs.

4. The blood system

5. Pulmonary artery Pulmonary vein Aorta Vena cava 1 2 3 4

6. Oxygenated and deoxygenated blood

7. Read page 185 of your text book and complete page 17 and the top of pg 18 of your booklet now Answer the summary questions on page 185 of the text book.