A Tough Sheath That Encloses an Organ or Body Part
This page is the CodyCross answer for the clue below from Mesopotamia, Group 970, Puzzle 1 (Astronomy and Astrology).
Question is: A Tough Sheath That Encloses an Organ or Body Part
and the answer is: CAPSULE
Word Meaning:
CAPSULE — (physiology) A membranous envelope.
Definitions from Wiktionary.