Another 40 trillion or so are blood cells, while fully half of the cells in your body do not have your genetic material at all.
A fully grown human adult might have between 80-100 trillion cells in them all told, where only about 4 trillion of them make up what you typically think of as your body: your musculoskeletal system, connective tissue, circulatory system, and all of your vital organs. A human being, for example, can be broken down into their individual organs, which in turn are made of individual units known as cells. When we break down matter itself, we find that everything we’re familiar with is actually made of smaller constituents. Just as light has a quantum mechanical wavelength defined by its energy, particles of matter have an equivalent wavelength - their de Broglie wavelength - regardless of their other properties, including their fundamental/composite nature. The way you determine the size of a macroscopic entity is typically to compare it to some standard of reference whose size is known: a ruler or other measuring stick, the amount of force that a spring (or spring-like object) is displaced by owing to that object, the light-travel-time it takes to cross the span of an object, or even through experiments that strike an object with a particle or photon of a particular wavelength. If you want to understand volume, you have to understand the way we make the measurements that reveal how large an object is. ( Credits: NASA and Inductiveload/Wikimedia Commons) One of the ways to measure the size of an object is to shine light of the proper wavelength upon it longer wavelengths will be transparent to those objects, while shorter wavelengths will be absorbed by it.
The size, wavelength and temperature/energy scales that correspond to various parts of the electromagnetic spectrum, along with comparably sized physical objects.
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