The Digestive System

Find the words in the grid. When you are done, the unused letters in the grid will spell out a hidden message. Pick them out from left to right, top line to bottom line.
Words can go horizontally, vertically and diagonally in all eight directions.

SALIVATHEDIGES
ESSTIVESEYRSNM
PTEEMGNSLETRIA
RAKMNRONVNTETL
BCNJYPQIQWJDSL
BVBCHZLLPJNDEI
IYIARHNVVENATN
LNGLWEVEMRNLNT
EUKMLGAYLTGBIE
SVPLFIHSFLMLES
KZWINCZPBMMLGT
JMBDICAONIMARI
ZERWSTOMACHGAN
RVGPARASITESLE

amino acidliver
bilepancreas
chymeparasites
enzymessaliva
esophagussmall intestine
fiberstomach
gallbladdervilli
large intestine