The Skin

Sensory Nerves

________: skin is innervated with these.

Desiccation

________- keratin, lipid layer.

Skin is made up of three layers

epidermis, dermis, hypodermis (fatty later)

Desiccation

keratin, lipid layer

Water

keratin, lipid layer

Sun/U-V

role of pigment / melanin

Cold/heat

surface blood vessels

Integrity

dermal layer has a network of tough collagen fibers in connective tissue

Basket cells

surround the base of hair follicles and can sense pressure

Blood Vessels

can carry nutrients and oxygen-rich blood to the cells that make up layers of skin

Hair Erector Muscle (Arrector Pili Muscle)

Tiny muscle connected to each hair follicle and the skin

Hair Follicle

a tube-shaped sheath that surrounds the part of the hair that is under the skin and nourishes the hair

Hair Shaft

the part of the hair that is above the skin

Langerhans Cells

Attach themselves to antigens that invade damaged skin and alert the immune system to their presence

Melanocyte

a cell that produces melanin, and is located in the basal layer of the epidermis

Pacinian corpuscle

a nerve receptor located in the subcutaneous fatty tissue that responds to pressure and vibration

Sensory Nerves

skin is innervated with these

Sebaceous Gland

empties oily secretion into the hair follicle

Sweat gland

small tubular structures within the subcutaneous

Ceruminous gland

specialized sudoriferous glands located in the EAC

What are the three layers of skin?

Epidermis, Dermis, Hypodermis (Fatty layer)

Why is skin a vital organ?

It cover the entire outside of the body and protects us from pathogens and injuries

How big is the skin? (Thickness and Weight)

2mm thick, 6lbs

What are the two types of skin?

Thin and Hairy & Thick and Hairless

What does the skin do?

Protects, and provides structure

What does the skin protect us from?

Air, Water, Sun (U-V), Cold/Heat

What layer of skin helps most with protection?

Epidermis

How does the skin protect us from desiccation?

Keratin and Lipid Layer

How does the skin protect us from water?

Keratin and Lipid Layer

How does the skin protect us from Sun (U-V)?

Role of Pigment / Melanin

How does the skin protect us from cold/heat?

Surface blood vessels

How does the skin provide structure?

The dermal layer has a network of collagen fibers

What does the skin do other than protect, and provide structure?

Regulate body temperature, gathers sensory information, and it stores, water, fat and synthesizes vitamin D

What are basket cells?

surround the base of hair follicles and can sense pressure. Evaluated when assessing nerve health

What are blood vessels?

can carry nutrients and oxygen-rich blood to the cells that make up layers of skin

What are hair erector muscles?

Tiny muscle connected to each hair follicle and the skin. When it contracts, the hair stands erect

What are hair follicles?

a tube-shaped sheath that surrounds the part of the hair that is under the skin and nourishes the hair

What are hair shafts?

the part of the hair that is above the skin

What are langerhans cells?

Attach themselves to antigens that invade damaged skin and alert the immune system to their presence

What is a melanocyte?

a cell that produces melanin, and is located in the basal layer of the epidermis

What is a pacinian corpuscle?

a nerve receptor located in the subcutaneous fatty tissue that responds to pressure and vibration

What are sensory nerves?

they sense and transmit heat, pain, and other sensations

What is the stratum corneum?

Outermost layer of epidermis

What are sebaceous glands?

empties oily secretion into the hair follicle

What are sweat glands?

small tubular structures within the subcutaneous

What are ceruminous glands?

specialized sudoriferous glands located in the EAC. Mixes with sebaceous to form cerumen

The skin is innervated with what?

Sensory nerves