LIPS

Composition: striated skeletal muscle fibers and connective tissue covered with:

• OUTER surface (pars cutanea) - skin that contains hair follicles, sebaceous glands, and sweat glands.

• TRANSITION zone (pars intermedia) - modified skin that contains parakeratinized stratified squamous epithelium without glands and hair follicles.

• INNER surface (pars mucosa)

• mucosa (mucous membrane) - stratified squamous nonkeratinizing epithelium and lamina propria (loose connective tissue).
• submucosa - irregular dense connective tissue, salivary glands - labial glands, blood and lymphatic vessels, nerves, white fat.