Different cells can have vastly different cell sizes; but as an approximation, let us assume that all cells in the body are spheres that are 16 micrometers (1.6 \times 10^{-5} \text{m} )(1.6×10 −5 m) in diameter. The current best estimate in the scientific literature is that there are approximately 40 trillion human cells (4 \times 10^{13}4×10 13 cells) in an adult human body. First,
calculate the volume of the human body based on these estimates.
Does the answer seem reasonable?