Lending Pool
Lending Pool is the component that contains the deposited assets and serves as the reserve for assets that are to be borrowed. Every asset that is used by the Lending Protocol has it's own Lending Pool.
Every Lending Pool has set of parameters that shows the state of the pool, how much is deposited, how much is borrowed, how much is reserved by the protocol maintainers and timestamp of the last update.
Lending Pool only has two methods, put and take, that are used to deposit or remove assets from the pool.
Lending Protocol is only one that can use the Lending Pool methods.