anatomy 5,6,9,10

stratum lucidum

thin, clear layer

stratum granulosum

three to give layers of keratinocytes

true or false: one of thee functions of the subcutaneous layers is thermal insulation

true

true or false: the subcutaneous layer consists of areolar and adipose connective tissue

true

true or false: the subcutaneous layer is avascular

true

functions of the integument system

-protects the body from wear and is renewable, -protects from UV rays, -promotes vitamin D3 formation, -resists water loss, -a microorganism barrier, -excretes waste, -temperature control, -receives external stimuli from the environment, -stores some chemical compounds such as vitamin D

stratum corneum

20-30 layers of dead keratinocytes

the papillary layer of the dermis contains _____ connective tissue and dermal papillae

areolar

which of the following types of connective tissue comprise the dermis

areolar, dense irregular

commonly occurs in the skin during aging

collagen fibers in the dermis decrease in number, reduced activity of skin stem cells

hair papilla

contains blood vessels and nerves

stratum spinosum

contains keratinocytes and dendritic cells

stratum basal

deepest layer of epidermis

epidermal _______ accomplish their immune function by their phagocytic activity , which initiates an immune response against invaders

dendritic cells

layers of epidermis in order

dermis, stratum basal, stratum spinosum, stratum granulosum, stratum lucidum, stratum, corneum

the dermal papillae interlock with deep projections of the epidermis called

epidermal ridges

layers of skin in order

epidermis, dermis, hypodermis

true or false: differences in skin pigmentation is due to a difference in the number of melanocytes each individual has

false

which of the following is not found in thick skin

hair follicles

The most abundant cells of the epidermis.

keratinocytes

hair shaft

portion of hair beyond the skin surface

which. of the following is most likely to cause stretch marks

pregnancy

hair root

protion of hair within the follicle e

after a stem cells divides in the epidermal stratum basal, the resulting daughter cell enters the stratum

spinosum

the integument consists of the epidermis, which is composed of ______, and the dermis, which is composed of______connective tissue

stratified squamous epithelium, dense irregular and areolar

hair bulb

swelling where the hair originates

select the function of the integument in which sweat glands are involved

temperature regulation