mouse TS23
embryo
cavities and their linings
limb
mesenchyme
vertebral axis muscle system
organ system
gland
visceral organ
alimentary system
oral region
gut
foregut-midgut junction
foregut
hindgut
midgut
anal region
liver and biliary system
renal/urinary system
reproductive system
respiratory system
nervous system
integumental system
sensory organ
cardiovascular system
skeleton
tail
extraembryonic component