Ectoderm and Endoderm derivatives


  1. Neural tube – Nervous system ie. brain, spinal cord, arachnoid and pia matter
  2. Sensory epithelium of sensory organs
  3. Pituitary gland
  4. Medulla of suprarenal gland
  5. Lining of anterior oral cavity and lower anal canal
  6. External auditory meatus and outer tympanic membrane (ear drum)
  7. Epidermis of skin


1. Epithelial lining of:

  • Respiratory tract
  • GIT tract except anterior oral cavity
  • Urinary bladder except trigone
  • Urethra
  • Eustachian tube

2. Parenchyma of:

  • Tonsils
  • Thyroid
  • Parathyroid
  • Thymus
  • Liver
  • Pancreas




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