Integumentary System. Covering and Lining Membranes. composed of epithelium bound to an underlying connective tissue. Mucous membranes: line body cavities that are open to the outside. Cutaneous membrane: the skin Serous membranes: line closed ventral body cavities.
Formed from the epidermis but reside in the dermis.
epidermal damage only
epidermal and some dermal injury
epidermis and dermis totally destroyed
**Third-degree burns require skin grafts.
◘ most common cause is exposure to ultraviolet radiation.
◘ Cure of basal cell and squamous cell carcinoma is complete if they are removed before melanoma, a cancer of melanocytes, forms. It is still fairly rare but is fatal in about half the cases.