The 1-to-6 of Skin Structure

Skin & and its appendages have/are
- 1 organ
- 2m-sq in area, 2 structures in subcutis (dermal papilla, subcutaneous vessel)
- 3 layers (epidermis, dermis, subcutis)
- 4kg in weight, 4 layers in epidermis
- 5 layers in basement membrane (basal keratinocyte, basal cell membrane, lamina lucida, lamina densa, sub-lamina densa)
- 6 structures in dermis (sweat gland, sweat duct, sebaceous gland, hair, superficial vascular plexus, deep vascular plexus)

Source: Davidson's Principles and Practice of Medicine, 20th ed.