1.2 Understand the importance of water as a solvent in transport, including its dipole nature.

Water is a polar molecule.it has a slight positive charge on one side and a slight negative charge on the other resulting in a net dipole. This is beneficial in many ways. 

hydrogen bonding holds water molecules together, this is what accounts for water being liquid at normal room temperatures. 

many chemicals, especially hydrophilic ones,  dissolve easily in water making them easy to transport, and water a great solvent. 

non-polar, hydrophobic substances e.g. lipids do not dissolve in water. this enables the transport of lipids in blood.

the specific heat capacity is high, taking 42000 Joules to heat one cm3 of water 1°C. This is because of the hydrogen bonding which requires a lot of energy to break. This maintains a constant body temperature.