Part of an Organ Often Accompanied by "oblongata"

This page is the CodyCross answer for the clue below from Street Fair, Group 1316, Puzzle 4 (Gourmet Chocolate).

Question is: Part of an Organ Often Accompanied by "oblongata"

and the answer is: MEDULLA

Word Meaning:

MEDULLA — The soft inner part of something, especially the pith of a fruit.

Definitions from Wiktionary.