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:  19  20 
  perineal body
  rectum
  rest of hindgut
  midgut
  anal region
  liver and biliary system
  renal/urinary system
  reproductive system
  respiratory system
  nervous system
  integumental system
  sensory organ
  ear:  01 
  external ear
  inner ear
  middle ear
  associated mesenchyme
  ossicle
  pharyngo-tympanic tube:  01  02  03 
  stapedius muscle
  tensor tympani muscle
  tubo-tympanic recess
  eye
  choroid
  anterior chamber
  choroidal blood vessels
  conjunctival sac
  cornea:  02  03  04  05 
  epithelium
  stroma
  skeletal muscle
  optic stalk
  eyelid
  hyaloid cavity
  lens
  optic chiasma
  perioptic mesenchyme
  retina
  nose
  meatus
  naris
  nasal capsule
  nasal cavity
  epithelium
  olfactory
  respiratory:  15  17  18  19 
  nasal septum
  naso-lacrimal duct
  turbinate bones
  vomeronasal organ
  cardiovascular system
  skeleton
  tail
  extraembryonic component