It is not due to any abnormal development of blood-vessels in the dermis.
The epiblast also forms the epidermis; not however the dermis, which is of mesoblastic origin.
The line of junction between the epiblast and the mesoblast coincides with that between the epidermis and the dermis.
A papilla of the dermis makes its appearance, the outer layer of which gradually calcifies to form the dentine and osseous tissue.
This vesicle is formed by the epidermis detached from the dermis, and elevated as a half sphere by serous liquid within.
Each placoid element consists of a spine with a broadly expanded base embedded in the dermis.
Feathers, like hairs, arise from epidermal papillae which become imbedded in pits in the dermis.
These last surround the central mass or core formed by the dermis.
The skin consists of an outer layer of epiblastic origin, the epidermis, and an inner layer of mesoblastic origin, the dermis.
Derma, or dermis, is the true skin lying under the epidermis (cuticle), which is known in contrast as the scarf-skin.
dermis der·mis (dûr'mĭs)
The sensitive connective tissue layer of the skin located below the epidermis, containing nerve endings, sweat and sebaceous glands, and blood and lymph vessels. Also called corium, cutis vera, derma1.