Does dietary cholesterol mix with the cholesterol that our body makes for our cells ?

How can a cholesterol that was made by something other than our own body do any thing in our body after it was cooked or frozen and reheated or canned or processed so that it can be stored for long periods without spoiling or mixed with preservatives , when eaten ? Our body makes cholesterol that is unique to us and it is used every day of our life by every cell and organ in our body . So how can we eat a foreign cholesterol and think it is identical to the one our body makes ?