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A&P Chapter 5

Integumentary System

2 regions of the skin Epidermis, dermis
Most superficial layer of skin Epidermis
4 cell types found in the epidermis Keratinocyte, melanocyte, epidermal dendritic cells, tactile cells
Fibrous protein that gives skin protective properties Keratin
Cell that synthesizes melanin Melanonocyte
Langerhans cells Epidermal dendritic cells
Cells that activate the immune system Epidermal dendritic cells
Tactile sensory receptor cell Merkel cells
Most superficial layer of the epidermis Stratum Corneum
Deepest epidermal layer Stratum Basale
aka Stratum germinativum Stratum Basale
Layer responsible for cell renewal Stratum Basale
aka prickly layer Stratum Spinosum
Contains keratinocytes linked by desmosomes Stratum Spinosa
This layer contains a high volume of Langerhans cells Prickly layer
Lamellated granules Stratum granulosum
3-5 cell layer where keratization begins stratum granulosum
Glycolipids which cause the skin to be waterproof are in which layer Stratum granulosum
aka Horny layer Stratum corneum
Thickest epidermal layer stratum corneum
Layer with fully keratinized cells stratum corneum
Layer found only in the thick skin stratum lucidium
Layer above the stratum granulosum in the thick skin stratum lucidium
Layer of skin associated with leather-"hide" Dermis
Superficial layer of the dermis Papillary layer
Layer of Areolar C.T. Papillary layer
Projections of the papillary layer that project into the epidermis dermal papillae
Friction ridges and sweat glands combine to form: Fingerprints
Meissners corpuscles Light touch receptors
Layer of the dermis made of dense irregular C.T. Reticular layer
Thicker part of the dermis Reticular layer
Bundles of collagen Cleavage/tension lines
Dermal folds near joints Flexure lines
Crimson pigment Hemoglobin
Cyanosis Bluing of skin during heart failure and severe respiratory disorders
aka merocrine glands Eccrine glands
Sweat glands abundant on palms, soles of feet and forehead Eccrine glands
2 types of sweat glands Eccrine and apocrine
aka sudoriferous glands sweat glands
Sweating is regulated by this system Autonomic nervous system
Most abundant sweat gland Eccrine gland
Sweat glands activated by puberty Apocrine glands
Sweat gland found in the axillary and genital areas Apocrine gland
Gland found in the external ear Ceruminous gland
Modified sweat gland Mammary gland
Gland that produces cerumen Ceruminous gland
Gland producing sebum Sebaceous gland
Glands which dump product into the hair follicle Apocrine and sebaceous
Holocrine type gland Sebaceous gland
Glands activated during puberty Apocrine and sebaceous
What forces sebum out of the hair follicle onto the skin? Arrector pili
What is created by the low pH of the secretions on the skin? Acid mantle
What forms the chemical barrier on the skin? Acid mantle
What forms the physical barrier of the skin? Keratinized cells and glycolipids
What creates the biological barrier of the skin? Dendritic cells and macrophages
Unnoticeable sweating Insensible sweating
Obvious sweating-visible Sensible sweating
Pacinian corpuscles Deep pressure sensors
How much blood can the skin hold? 5% of total volume
Metabolic function of the skin Sunlight turns cholesterol into inactive vit D
Skin as a secondary excretion organ small amount of nitrogenous wastes in the sweat
Least malignant cancer Basal cell carcinoma
Most malignant cancer Melanoma
Cancer of the stratun basale cells Basale cell carcinoma
Cancer of the keratinocytes of the stratum spinosa Squamous cell carcinoma
Cancer of the melanocytes Melanoma
Rules for recognizing melanoma Asymmetry, Border, Color, Diameter
Tissue damage caused by heat Burn
Body area burned Rule of nines
Cheesy looking substance protecting the skin of a fetus Vernix caseosa
Created by: 1661678007



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