Anatomy of the Skin Layers

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Questions and Answers

What are the three distinctive layers that form the skin?

The epidermis, the dermis, and the hypodermis (subcutaneous layer)

What specialized cells are found in the epidermis, and what are their functions?

Langerhans cells are macrophages that phagocytize infectious agents and then travel to lymphatic organs. Melanocytes produce melanin pigment responsible for skin color.

What is the outermost layer of the epidermis composed of?

The outermost layer of the epidermis is composed of flattened, dead cells known as the stratum corneum.

In which layer of the epidermis do cells begin to die, and what is it named for?

<p>Cells begin to die in the stratum granulosum, which is named for the abundance of granules present.</p> Signup and view all the answers

What type of tissue is the dermis composed of?

<p>The dermis is composed of dense irregular connective tissue.</p> Signup and view all the answers

What is the function of carotene pigment in the epidermis and dermis?

<p>Carotene pigment gives a yellowish form, particularly in Asian peoples.</p> Signup and view all the answers

What is the function of the sebaceous gland?

<p>The sebaceous gland produces sebum (oil) to help keep the skin soft and pliable.</p> Signup and view all the answers

Where are the free nerve endings located?

<p>The free nerve endings are associated with pain sensation and are located near the dermal papillae.</p> Signup and view all the answers

What is the primary function of the skin?

<p>The most important function of the skin is protection, serving as a barrier against infection, UV light, and disease.</p> Signup and view all the answers

Where are Meissner's corpuscles located?

<p>Meissner's corpuscles, which are touch receptors associated with tactility, are located near the dermal papillae.</p> Signup and view all the answers

What is the composition of sweat produced by the sweat gland?

<p>Sweat produced by the sweat gland is a mixture of water, salts, and urea which acts to cool the body.</p> Signup and view all the answers

What is the function of the arrector pili muscle?

<p>The arrector pili muscle pulls up the hair follicle, leading to goose flesh or 'goose bumps'.</p> Signup and view all the answers

What is the role of Pacinian corpuscles?

<p>Pacinian corpuscles are pressure receptors located deep within the dermis at the boundary of the dermis and hypodermis.</p> Signup and view all the answers

What are the components of sebum secreted by the sebaceous gland?

<p>Sebum secreted by the sebaceous gland is a complex lipid which is bactericidal and fungistatic.</p> Signup and view all the answers

What is the function of the apocrine sweat glands?

<p>The apocrine sweat glands are responsible for the odor of the body and open directly into the hair follicle.</p> Signup and view all the answers

Where are the blood vessels that supply nutrition to the skin located?

<p>The blood vessels that supply nutrition to the skin are located in two horizontal layers: the deep plexus just above the subcutaneous fat, and a superficial plexus in the papilla.</p> Signup and view all the answers

Which layer of the skin is responsible for producing the melanin pigment?

<p>Epidermis (C)</p> Signup and view all the answers

What type of tissue forms the outermost layer of the epidermis?

<p>Keratinized stratified squamous epithelium (D)</p> Signup and view all the answers

Which layer of the skin contains carotene pigment responsible for giving a yellowish tone to the skin?

<p>Dermis (B)</p> Signup and view all the answers

What is the primary function of Langerhans cells in the skin?

<p>Phagocytize infectious agents (C)</p> Signup and view all the answers

Flashcards

Skin layers

The skin is made up of three layers: epidermis, dermis, and hypodermis.

Epidermis cells

Langerhans cells (phagocytes) and melanocytes (produce melanin) are found here.

Stratum corneum

Outermost layer of epidermis, dead cells.

Stratum granulosum

Epidermal layer where cells die.

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Dermis tissue

Dense irregular connective tissue.

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Carotene function

Gives yellowish tone to skin.

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Sebaceous gland function

Produces sebum to keep skin soft.

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Free nerve endings

Associated with pain sensation.

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Skin's main function

Protection against infection, UV, and disease.

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Meissner's corpuscles

Touch receptors near dermal papillae.

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Sweat composition

Water, salts, and urea.

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Arrector pili muscle

Causes goosebumps.

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Pacinian corpuscles

Pressure receptors in dermis and hypodermis.

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Sebum composition

Complex lipid, bactericidal, fungistatic.

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Apocrine sweat glands

Responsible for body odor; open into hair follicles.

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Skin blood vessels

Deep and superficial plexuses supply nutrients.

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Melanin production layer

Epidermis produces melanin.

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Epidermis tissue

Keratinized stratified squamous epithelium.

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Carotene layer

Dermis contains carotene, resulting in yellowish skin tone.

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Langerhans cell function

Phagocytize (consume) infectious agents.

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