Skin Encyclopedia - Epidermis The epithelium covering the...

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Epidermis The epithelium covering the surface of the skin Stratum Corneum Exposed surface of the skin. Top layer of Epidermis. Flake off and get replaced by new cells. Stratum Basale Deepest epidermal layer. Nourished by dermal blood. Cells are undergoing mitosis. Cells move up and die. Dermis The connective tissue layer beneath the epidermis of the skin. Papillary Layer Consists of areolar tissue that supports and nourishes the epidermis. Contains nerves. Dermal Papillae Dermis that interlocks with recesses in epidermis. Reticular Layer Interwoven connective tissue. Made of elastic and collagen fibers. Hypodermis Subcutaneous layer. Areolar tissue with many adipose (fat) cells. Sensory Receptors Specialized cells that monitor conditions inside or outside the body. Blood Vessels Transport blood, blood cells, nutrients, and oxygen throughout the tissues of the human body. Keratinocytes
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Unformatted text preview: Tough, fibrous protein component of nails, hair, calluses, and general epidermis Melanocytes Specialized cells in the deeper layers of stratified squamous epithelium of the skin Stratified Squamous Tissue Found in protected regions where absorption takes place. Dense Connective Tissue Dense fibrous tissue. Type of connective tissue with fibers as its main matrix element. Adipose Tissue Loose connective tissue dominated by adipocytes. Sebaceous Glands Oil glands. Discharge an oily lipid secretion into hair follicles. Sweat Glands Two types: Sudoriferous glands and Apocrine sweat glands. Merocrine secrete directly onto skin. Apocrine secrete into hair follicles. Hair Follicle and Shaft Organ that produces hair. Found in dermis. We see the shaft on the surface. Arrector Pili Muscle Smooth muscles whose contraction cause erection of hair....
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