Exercise 18 Flashcards
Layer found only in thick skin consisting of a few rows of flattened dead cells.
Stratum Lucidum (clear layer)
A dark pigment produced by melanocytes that protects the skin from ultraviolet radiation.
Melanin
Gland that secretes sweat directly onto the surface of the epidermis via a duct.
Eccrine sweat gland
Outer most layer of the epidermis.
Stratum Corneum (horny layer)
Uppermost, thin superficial layer of the dermis.
Papillary layer
Small muscle attached to each hair follicle.
Arrector pili muscle
Makes up the greatest portion of the skin and is responsible for the structural strength of the skin.
Dermis
Touch receptor in the hypodermis that is sensitive to heavy pressure.
Pacinian corpuscle
Epidermal layer that still shows some cell division and contains a large number of Langerhans cells.
Stratum Spinosum (spiny layer)
Keratin-producing cell.
Keratinocyte
Upward projections of the dermis that interdigitate with the epidermis to hold the layers together.
Dermal papilla
A macrophage found in the epidermis.
Langerhans cell
A layer made of a single row of actively dividing keratinocytes.
Stratum basale (basil layer)
Thick layer of the integument made of loose areolar connective tissue rich with adipose.
Subcutaneous Layer (hypodermis)
Found in the basal layer of the epidermis and associated with sensory nerve endings.
Merkel Cell
Invagination of the epidermis in which a hair is anchored.
Hair Follicle
Main cell in the hypodermis and is filled with fat.
Adipocyte
The outermost layer of the skin.
Epidermis
Epidermal layer that consists of multiple rows of keratinocytes that are beginning to fill with keratin and the nuclei are degenerating.
Stratum Granulosum (granular layer)
Cell found in the epidermis that produces a dark pigment.
Melanocyte
Sebum-producing gland that secretes directly into the hair follicle.
Sebaceous Gland
Cellular component of the dermis that manufactures fibers and ground substance.
Fibroblast
Deeper layer of the dermis that consists of dense, irregular connective tissue.
Reticular layer
Touch receptor in the hypodermis that is sensitive to light touch.
Meissner’s corpuscle
