mouse TS23
  embryo
  cavities and their linings
  limb
  mesenchyme
  vertebral axis muscle system
  organ system
  gland
  visceral organ
  nervous system
  integumental system
  sensory organ
  ear
  eye
  choroid
  anterior chamber
  choroidal blood vessels
  conjunctival sac
  cornea
  skeletal muscle
  optic stalk
  eyelid
  hyaloid cavity
  lens
  optic chiasma
  perioptic mesenchyme
  retina
  nose
  cardiovascular system
  skeleton
  tail
  extraembryonic component