Flashcards in Class 5: The Skin Deck (61)
Integumentary System consists of
hair, nails, and cutaneous glands
Skin is the most...
Skin is the body's largest and heaviest...
hypodermis is a
connective tissue layer below the dermis
Functions of skin
-resist trauma and infection
-synthesize vitamin D
Epidermis is composed of
keratinized stratified squamous epithelium
The epidermal water barrier is...
Critical to retaining water in the body and preventing dehydration. Makes us waterproof.
Cells above the water barrier quickly...
5 types of cells of the epidermis are (deepest to most superficial)
-tactile (merkel) cells
-dendritic (langerhans) cells
Outer layers of epidermis to inner
How many days does it take for a keratinocyte to make its way to the skin surface and flake off?
Dermis location, type of tissue
connective tissue layer beneath the epidermis
Dermis is composed of mainly
-collagen with elastic fibers
The Dermis is well supplied with
blood vessels, sweat glands, sebaceous glands, and nerve endings
what is rooted in the dermis?
hair follicles and nail roots
what type of muscle is associate with hair follicles?
smooth muscle (piloerector muscles)
Hypodermis is what type of tissue?
-Pads the body
-binds the skin to underlying tissues
-absorbs injected drugs
-contains subcutaneous fat
people of different skin color have the same or different number of melanocytes?
Melanin amount varies with exposure to
UV rays of sunlight
Blueness of the skin is called
redness of the skin is called
pale or ashen skin is called
yellowing of the skin is called
friction ridges are the markings on the...
fingertips that leave oily fingerprints
flexion lines are...
lines on the flexor surfaces of the digits, palms, wrists, and elbows
freckles and moles are made up of what?
tan to black aggregations of melanocytes