abdomen
action
anus
appendix
blind gut
bowels
brain
cecum
census
clockworks
colon
composition
constituents
content
contents
divisions
drive train
duodenum
elements
endocardium
entrails
foregut
gear
giblets
gizzard
guts
heart
hindgut
index
ingredients
inner mechanism
insides
internals
intestine
inventory
inwards
items
jejunum
kidney
kishkes
large intestine
list
liver
liver and lights
lung
machinery
mechanism
midgut
motion
movement
internal organ
viscus