Major cell type of the dermis. Produce and secrete procollagen and elastic fibers.
provide tensile strength and resistance to shear and other mechanical forces
Epidermal appendages are intradermal epithelial structures lined with epithelial cells with the potential for division and differentiation. These are important as a source of epithelial cells, which accomplish reepithelialization should the overlying epidermis be removed or destroyed in situations such as partial thickness burns, abrasions, or split-thickness skin graft harvesting.
Epidermal appendages include the following:
They often are found deep within the dermis and in the face may even lie in the subcutaneous fat beneath the dermis. This accounts for the remarkable ability of the face to reepithelialize even the deepest cutaneous wounds.
Sebaceous glands found over the entire surface of the body except the palms, soles, and dorsum of the feet.
Llargest and most concentrated in the face and scalp
Sweat glands, or eccrine glands, found over the entire surface of the body except the vermillion border of the lips, the external ear canal, the nail beds, the labia minora, and the glans penis and the inner aspect of the prepuce. They are most concentrated in the palms and soles and the axillae.
Apocrine and mammary glands
Apocrine glands found in the axillae, in the anogenital region and in the external ear canal, eyelid (Moll's glands), and the breast (mammary glands). They produce odor and do not function prior to puberty. The mammary gland is considered a modified and highly specialized type of apocrine gland.
Found over the entire surface of the body except the soles of the feet, palms, glans penis, clitoris, labia minora, mucocutaneous junction, and portions of the fingers and toes. Sebaceous glands often open into the hair follicle