Even then, Ingber notes, «you need to know how the drug crosses in and
out of the bloodstream across the blood vessel wall, and from one tissue and into another tissue» — something organoids can't yet test.
And in the midst
of all
of this, your gut must break down all the food you eat into its individual components, separate
out all the vitamins and minerals and shuttle everything
across that one cell thick layer into your
bloodstream for you to stay healthy.