(i) Formation of skin, sweat glands, oil glands, mammary glands etc.
(ii) Creation of hair, nails, feathers, horns, scales and scales.
(iii) Structure of retina, cornea and lens of the eye.
(iv) Covering structure of lips, lips, oral glands and tongue.
(v) Membranous labyrinth of inner ear and enamel structure of teeth.
(vi) Covering formation of pituitary gland and pineal gland.
(vii) Forms part of kidney medulla, integument of anus and cloaca.
(viii) Nervous system and sensory organs.
