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Integumentary Ch 6

The Integumentary System

What are the two major regoins of the Skin (Integument)? Epidermis and dermis.
Integument is separated from the deep fascia by the ___________. Hypodermis (Superficial Fascia)
What is the epidermis composed of? Keratinized Stratified Squamous Epithelium.
The epidermis consists of ___ distinct cell types and ___ or ____ layers. Four, Four, Five
What produces fibrous protien keratin? Keratinocytes.
What produces the brown pigment melanin? Melanocytes.
What is the definition of Langerhans' cell? Epidermal macrophages that help activate the immune system.
What are Merkel cells? Touch receptors (sensory system).
What is the epidermis composed of? Epithelial cells.
What is the dermis composed of? Fibrous connective tissue.
What connects the keratinocytes? They are tightly connected by desmosomes.
Where is keratinocytes found? In the deepest part of the epidermis from the cell layer, Stratum Basale.
This epidermis cell has a spider-shaped epithelial cell. Melanocytes.
Where is Melanocytes found in the epidermis? The deepest layer of the epidermis.
What is another word used for Langerhans cells? Epidermal Dendritic cells.
What is the purpose of Langerhans cells? They ingest foreign substances and are key activators of our immune system.
What is the shape of Langerhans cells? Star-shaped.
Where are Langerhans cells? Arise from bone marrow and migrate to the epidermis.
What is another word for Merkle cells? Tactile cells.
What is the shape of the Merkle cell? Spiky hemisphere.
The purpose of the Merkle cell functions as a... Sensory receptor for touch.
What is the deepest epidermal layer? Stratum Basale
What does the Stratum Basale consist of? Single row of the youngest keratinocytes.
Cells undergo rapid division is what epidermal layer? Stratum Basale
Which layer of the epidermis is concidered the "prickly" layer? Stratum Spinosum
The Stratum Spinosum consists many layers of __________. Keratinocytes
In Stratum Spinosum, the keratinocytes contain a ________ system of ___________ ___________ attched to desmosomes. Weblike, Intermediate Filaments
Melanin granules and Langerhans' cells are abundant in what layer? Stratum Spinosum.
What layer of the epidermis contains a 3 to 5 cell layers? Stratum Granulosum.
In Stratum Granulosum, drastic changes in ___________ appearance occurs. Keratinocyte.
Keratohyaline granules... form keratin. (Strong skin)
Lamellated granules... contain water-resistant glycolipids.
The thin epidermis layer that lies between the Stratum Granulosum and the Stratum Corneum. Stratum Lucidum.
The Stratum Lucidum constits of... few rows of flat, dead keratinocytes.
The Stratum Lucidum is present only in ____ ____. thick skin
Palm of hand, and sole of foot is an example of... Stratum Lucidum.
The outter most layer of keratinized, dead cells. Stratum Corneum.
Functions of the Stratum Corneum are... Water-resistance, protection, and rendering the body.
The second major skin region is the _____. Dermis
What are the cells found in the dermis? Connective tissue proper: fibroblasts, macrophages, mast cells, and white blood cells.
What are the two layers of the dermis? Papillary and reticular.
What tissue is found in the papillary layer of the dermis? Areolar connective tissue; with collagen and elastic fibers.
What is the purpose of the papillary layer? Sensory: free nerve endings.
Meissner's corpuscles are the _______ receptors of the papillary layer. touch
What is the tissue found in the reticular layer of the dermis? Dense irregular connective tissue; collagen and elastin fibers.
In the reticular layer, collagen fibers add ________ and resiliency to the skin. strength
In the reticular layer, elastin fibers proved _______-_______ properties. stretch-recoil
Subcutaneous layer deep to the skin is... hypodermis.
What is the hypodermis composed of? Adipose and areolar connective tissue.
The hypodermis has a very rich... blood supply.
Three pigments contribute to skin color: melanin, carotene, and hemogoblin.
A polymer made of tyrosine amino acids. Its two forms range in color from ______ to ______ to _________ to _______. Melanin. Yellow, tan, redish-brown, black.
What are enzymes called in melanocytes? Tyrosinase.
Yellow to orange pigment, that is most obviouse in palms and soles of the feet. Carotene.
Where is carotene found? Stratum corneum and fatty tissue of the hypodermis.
Reddish pigment responsible for the pinkish hue of the skin is... Hemoglobin.
Hemoglobin is found in... red blood cells circulationg the dermal cappilaries.
Distributed over the entire skin surface except the nipples and parts of the external genitalia. Sweat glands.
Two types of sweat glands are: Eccrine and apocrine.
Cells in sweat glands are... associated with myoepithelial cells.
Created by: 100000292031411



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