BIO 210 Lab Integumentary

free nerve endings

dermis

hair bulb

soles of feet and palms of hands

adipose connective tissue

stratum corneum

merocrine sweat gland

stratum lucidum

dermis

hair shaft

thick skin

stratum basale

arrector pili muscle

papillary layer of dermis

meissner’s corpuscle

stratum lucidum

meissner’s corpuscle

stratum spinosum

subcutaneous layer

stratum basale

stratum granulosum

epidermis

hair bulb

hair root

stratum corneum

thin skin

sebaceous gland

hair follicle

apocrine sweat gland

hair follicle

sebaceous gland

reticular layer of dermis

arrector pili muscle

dermal papillae

hair follicle

stratum spinosum

hair shaft

stratum granulosum

blood vessels from the dermis

The cells of the epidermis receive oxygen and nutrients from

epidermis, dermis, hypodermis

Identify the correct order of layers (from outer to innermost layers):

Sebaceous glands

Secrete oil onto the hair and the skin surface.  

Merocrine glands

Responsible for sensible perspiration 

Apocrine glands

Produce a sticky, cloudy secretion and are found in the armpits, nipples, and groin.  

Meissner's corpuscles

Detect light touch sensations

Pacinian corpuscle

Detect deep pressures and vibrations

dermal papillae

finger-like projections in the papillary layer of dermis

reticular layer

layer contains elastic and collagen fibers in the dermis

subcutaneous layer

layer consists of adipose and areolar connective tissue

papillary layer

superficial layer of dermis that contains tactile corpuscles

epidermis

layer is avascular

keratin

What material gives the epidermis the ability to resist abrasion and reduce water loss?

hair shaft

part of the hair that is exposed above the surface of the skin

sebaceous gland

produces an oily mixture to help protect skin and hair

hair root

part of the hair that lies below the surface of the skin

hair follicle

tube-like structure where hair growth begins

hair bulb

rounded portion of hair that contains basal cells that undergo mitosis

arrector pili muscle

responsible for "goosebumps"

true

The epidermis is made up of keratinized stratified squamous epithelium.  

thin skin

found in all areas except palms of hands and soles of feet

thick skin

found in the palms of hands and soles of feet

sebaceous glands

secrete in all areas except palms of hands and soles of feet

apocrine glands

secrete in the axillae, genital area, and nipple area

5

While walking barefoot in the woods, Joe stepped on a thorn that penetrated through the sole of his foot to the dermis. How many layers of epidermis did the thorn penetrate?

Stratum Corneum

15-30 cell layers thick

Stratum Spinosum

Contains cells with prominent cytoskeletons

Stratum Lucidum

Only present in thick skin

Stratum Granulosum

Contains cells producing large amounts of protein

Stratum Germinativum 

Contains stem cells 

sebaceous

Glands that discharge an oily secretion into hair follicles are ______ glands.

Dendritic cells 

Which of the following helps protect the skin against invading microorganisms?

squamous

cells are thin, flat, scale-like

cuboidal

cube-shaped or hexagonal

columnar

tall, column-like

transitional

rounded, change shape with degree of stretching

true

The hair follicle is made of epidermal cells, but is located in the dermis.  

true

Another name for the subcutaneous layer is the hypodermis.