What role does our circulatory system have with
regards to fighting infection?

Protects the physique against disease and infection. Clotting stops bleeding after injury. Transports HORMONES to goal cells and organs.

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.