W3D2 integumentary system, skin morphologies

Question 1

epidermis

Answer 1

outermost layer of skin

Question 2

dermis

Answer 2

lies below the epidermis

has connective tissue, vessels, hair follicles, sweat and sebaceous glands, mechanoreceptors (nerve endings that enable sensation)

Question 3

hypodermis

Answer 3

lies below the dermis

has the main vascular and lymphatic supply

has adipose tissue

Question 4

primary skin lesion

Answer 4

lesion that originates from previously normal skin

is directly associated w/ a disease process

includes: macule, papule, nodule, plaque, vesicle, bulla, pustule

Question 5

macule

Answer 5

change in color of skin

flat

small (less than 1cm diameter)

Question 6

patch

Answer 6

like a macule, but larger (more than 1cm diameter)

Question 7

papule

Answer 7

solid, raised lesion

has distinct borders

small (less than 1 cm diameter)

ex: moles, warts, eczema

Question 8

plaque

Answer 8

solid, raised, flat-topped lesion

> 1cm in diameter

ex: moles, warts, eczema

Question 9

nodule

Answer 9

solid, raised, non-flat-topped lesion

> 1cm in diameter

ex: moles, warts, eczema

Question 10

wheal

Answer 10

usually transient (aka evanescent), so goes away within 24-48 hours

papule or plaque, usually formed in associattion w/ skin trauma or allergy

may be pruritic (hives)

Question 11

vesicle

Answer 11

small, raised lesion

filled w/ clear fluid

ex: herpes zoster

Question 12

bulla

Answer 12

raised lesion

filled w/ clear fluid

> 1cm diameter

ex: blisters from friction

Question 13

pustule

Answer 13

raised lesion

filled w/ pus

ex: acne, infection of hair follicles