The body

S S S F M B T K N E E T D H T R K K A U E R A U S B O T T S E E E C S Y A E N E O E N I I D L E E C H E I L L E E I W R L E H C L H H L B T L H A B W U T C I E C Y D S B T I R O D O O A A S A F N O U S O B N N H N D E I E N W O T G E A E R S H N C I B S M E A H H I L E G K E A L K L R S Y A S R E K V C I U I S E N H D O R A N K L E N N L T O O F S T O M A C H G F E E S P I L F I S T P T S

ANKLE BACK BELLY BLOOD BONE BRAIN CHEEKS CHEST CHIN EARS ELBOW FACE FINGERS FIST FLESH FOOT FOREHEAD HAIR HAND HEAD HEART KNEE LEG LIPS LUNGS MOUTH MUSCLES NAIL NECK SHOULDERS SKELETON SKIN STOMACH TEETH VEIN WAIST WRIST

The secret sentence:

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