| Ectoderm | Mesoderm | Endoderm |
|---|
| All nervous tissue | Skeletal, smooth, and cardiac muscle | Epithelium of digestive tract (except that of oral and anal cavities) |
| Epidermis of skin and epidermal derivatives (hairs, hair follicles, sebaceous and sweat glands, nails) | Cartilage, bone, and other connective tissues | Glandular derivatives of digestive tract (liver, pancreas) |
| Cornea and lens of eye | Blood, bone marrow, and lymphoid tissues | Epithelium of respiratory tract, auditory tube, and tonsils |
| Epithelium of oral and nasal cavities, of Paranasal sinuses, and of anal canal | Endothelium of blood vessels and lymphatics | Thyroid, parathyroid, and thymlus glands |
| Tooth enamel | Serosae of ventral body cavity | Epithelium of reproductive ducts and glands |
| Epithelium of pineal and pituitary glands and adrenal medulla | Fibrous and vascular tunics of eyes | Epithelium of reproductive ducts and glands |
| Melanocytes | Synovial membranes of joint cavities | Epithelium of urethra and bladder |
| Some cranial bones and branchial Cartilages (derived from neural crest) | Organs of urogenital system (ureters,kidneys, gonads, and reproductive ducts) | |