Chapter-4-Skin-and-Body-Membranes

Cutaneous Membrane

The skin; a dry membrane that serves as the outermost protective boundary.

Epidermis

The outer layer of the skin, composed mainly of keratinized stratified squamous epithelium.

Melanin

Pigment produced by melanocytes that provides color to the skin and offers protection from UV damage.

Sebaceous Gland

Oil-producing gland in the skin that lubricates and protects hair and skin.

Sweat Gland

Glands that produce sweat for thermoregulation and excretion of wastes.

Mucous Membrane

Lines body cavities that open to the exterior; moist membranes adapted for absorption and secretion.

Serous Membrane

Membrane that lines closed body cavities and covers organs; consists of a layer of simple squamous epithelium and underlying connective tissue.

Synovial Membrane

Connective tissue membrane that lines joints and secretes synovial fluid for lubrication.

Carotene

Orange-yellow pigment found in some vegetables; contributes to skin color.

Basal Cell Carcinoma

The most common and least malignant type of skin cancer that arises from the stratum basale.

Squamous Cell Carcinoma

Type of skin cancer that can metastasize and arises from the stratum spinosum.

Malignant Melanoma

The most dangerous form of skin cancer, characterized by rapid metastasis and arising from melanocytes.

Rule of Nines

A method to estimate the body surface area affected by burns; divides the body into sections representing 9% of total area.

First-Degree Burn

Burn affecting only the epidermis, resulting in red and swollen skin.

Second-Degree Burn

Burn affecting the epidermis and upper dermis, characterized by redness and blisters.

Third-Degree Burn

Burn that destroys the entire skin layer, appearing gray-white or black and is painless due to nerve damage.