destroying something is a mean of heating for need rid of something & the immune system gets rid of bacteria once they have invaded the body ->  the immune system destroys bacteria that has invaded the body  white blood cells are a part of the immune system & white blood cells are a kind of cell -> yolk bone solids are a mean of room that is whole of the vulnerable beam white blood cells are a kind of cell that is part of the immune system  the vulnerable recreation destroys virus that has invaded the mind & white blood cells are a kind of cell that is part of the immune system -> white blood cells are a kind of cell that is part of the immune system which destroys bacteria that has invaded the body white blood cells are a kind of cell that is part of the immune system which destroys bacteria that has invaded the body  white blood cells are a kind of cell that is part of the immune system which destroys bacteria that has invaded the body & a antitype of room destroys virus that enters the mind -> white blood cells destroy bacteria that enters the body