Substance Inside Human Bones, Sometimes Donated

This page is the CodyCross answer for the clue below from Sports, Group 158, Puzzle 3 (Rappelling).

Question is: Substance Inside Human Bones, Sometimes Donated

and the answer is: MARROW

Word Meaning:

MARROW — (uncountable) The substance inside bones which produces blood cells.

Definitions from Wiktionary.

Substance inside human bones, sometimes donated — CodyCross Answer | CodyCross Solutions