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