While some medical practices in the Pentateuch are similar to those found in the ancient Egyptian papyri, conspicuously absent in the Pentateuch are the harmful malpractices of the Egyptians. Moses writings contain the most advancedâsound and flawlessâmedical practices recorded.
1 Cortex â the outer region of the kidney; extensions of the cortical tissue, contains about one million blood filtering nephrons. 2  Nephron â these are the filtration units in the kidneys. 3  Medulla â inner region of the kidney contains 8-12 renal pyramids.4  The pyramids empty into the calyx. Cortex â the outer region of the kidney; extensions of the cortical tissue, contains about one million blood filtering nephrons. 2  Nephron â these are the filtration units in the kidneys. 3  Medulla â inner region of the kidney contains 8-12 renal pyramids.
It is the inner part of the kidney, quite well explained in Wikipedia (see Renal Medulla). See also Where in the kidney is the renal medulla?, from which this image is lifted: