Biology

The cell is the basic building block of life.  Inside the cell there are many structures and chemicals and some of these chemicals could be likened to certain household chemicals found commonly in our kitchens or restrooms.  For instance, the cell membrane is mostly collagen and protein.  Proteins can be found around the house in many other compounds like milk and cheese.  Collagen is also a chief component of moisturizing lotions that we used to soften our skin.  The fluid inside the cell is mostly water, just like our ordinary tap or drinking water, but suspended in it are certain chemicals like sodium which could be found in ordinary table salt, potassium, which is present in some condiments like soy sauce or cranberry sauce, particles known as enzymes which can be found in household items like sour milk and exfoliating preparations that moms use to clean their faces.  There are also lipids or fats in cells which is similar to ordinary cooking oil or some animal fats that we use like lard or Crisco.  Phosphorus is another chemical in the cell which can be found readily in matchstick heads.
   
These materials inside the cell all have their own functions just as the chemicals in our households also have a specific effect on things.  So, looking at all these chemicals that are found in the cell, we can easily say that the smallest biological particle of living organisms is not so small after all, especially when considering the complexities within this tiny particle.  More so, if the functions of each of these chemicals are considered, the picture becomes even more complex, even more complex than just an ordinary household with ordinary household chemicals.