Feathers are complex structures primarily composed of keratin. The formation of feathers begins in the embryo during the early stages of development. The initial step involves the thickening of the epidermis to form a placode, which subsequently invaginates to form a feather bud.
What Are the Key Stages of Feather Development? 1. Placode Formation: The epidermal thickening marks the initiation of feather development. 2. Bud Stage: The placode invaginates and elongates to form the feather bud. 3. Barb Ridge Formation: The feather bud differentiates into barb ridges, which are precursors to the barbs of the feather. 4. Feather Follicle Formation: The feather bud invaginates into the dermis to form a follicle, from which the feather grows.
