D170 W15 Integument Williams

What are the five functions of the skin (integument)?

Label the following structures:

The Epidermis: Describe the basics of each layer, using the appropriate key words.

Stratum basale

Stratum spinosum

Stratum granulosum

Stratum lucidum

Stratum corneum

Label the diagram of the epidermis:

The Dermis: Describe the basics of each layer, using the appropriate key words.

Dermis – papillary dermis

Dermis – reticular dermis

Hypodermis

What is the difference between thick skin and thin skin?

Describe the following types of epidermal and dermal modifications.

Epidermal (friction) ridges –

Cleavage lines –

Flexure lines –

Describe how the following pigments contribute to skin color:

Melanin –

Carotene –

Hemoglobin –

Summarize the description, function and distinguishing structures of the following skin appendages. Use the key words as listed at the end.

Nails

Hair

Hair follicles

Sebaceous glands

Eccrine sweat glands

Apocrine sweat glands

Key Words

EpidermisStratum corneumStratum granulosumStratum spinosumStratum lucidumStratum basaleKeratinocytesMelanocytesDendritic cellMelaninCaroteneHemoglobinCleavage linesFlexure linesEpidermal (friction) ridgesDermal papillaeDermisReticular dermisPapillary dermisHypodermisNailHard keratinSoft keratinNail matrixNail rootNail bedLunuleEponychiumHair folliceHair rootHair shaftDermal (hair) papillaHair matrixArrector pili muscleSebaceous glandSebumEccrine glandApocrine gland