Cell Types and Layers of the of the Epidermis Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Sweat pore Stratum corneum Exfoliating keratinocytes Stratum lucidum Stratum granulosum Dead keratinocytes Sweat duct Living keratinocytes Dendritic cell Stratum spinosum Tactile cell Melanocyte Stem cell Stratum basale Dermal papilla Tactile nerve fiber Dermis Dermal blood vessels Figure 6.3

Cell Types and Layers of the of the Epidermis Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Sweat pore Stratum corneum Exfoliating keratinocytes Stratum lucidum Stratum granulosum Dead keratinocytes Sweat duct Living keratinocytes Dendritic cell Stratum spinosum Tactile cell Melanocyte Stem cell Stratum basale Dermal papilla Tactile nerve fiber Dermis Dermal blood vessels Figure 6.3

Structure of the Skin Figure 6.1 Hairs Sweat pores Dermal papilla Epidermis Tactile corpuscle (touch receptor) Blood capillaries Hair follicle Dermis Sebaceous gland Hair receptor Apocrine sweat gland Hair bulb Hypodermis (subcutaneous fat) Sensory Merocrine sweat nerve fibers gland Piloerector muscle Cutaneous blood vessels Lamellar (pacinian) corpuscle (pressure receptor) Motor nerve fibers Figure 6.1

Structure of Hair Follicle Hair shaft Sebaceous gland Piloerector muscle Hair receptor Bulge Hair root Hair matrix Hair bulb Apocrine sweat gland Dermal papilla Blood capillaries in dermal papilla

Fingernail Structure Figure 6.10 Free edge Nail body Nail groove Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display Free edge Nail body Nail groove Nail fold Lunule Eponychium (cuticle) Nail root Nail plate Nail fold Free edge Nail body Eponychium (cuticle) Nail bed Nail matrix Figure 6.10