You inhale second hand smoke. The white blood cells in your lungs are now busy trying to engulf the particulates that have entered your lungs.
How might lysosomes inside a white blood cell break down the particulates of cigarette smoke in your lungs.
There are many ways for the particulates to enter our bloodstreams. First, it can get through our mouths where there are openings in the linings Secondly, it can be absorbed through the lungs via the mucus of the tracheae which is connected in the bloodstreams.
When the particulates enter the bloodstreams, our immune responses will try its best to defend us from the foreign bodies entering the system. One of the first lines of defense is our lysosomes. Generally, the main function of lysosomes is to digest things - things that part of the cells or outside contributions that are not necessary to the body. Our lysosomes contain over 40 kinds of enzymes that can breakdown the particulates into smaller molecules that are not foreign to the body.