SKIN CARE PRODUCTS Flashcards
The first line of defense against certain harmful microorganisms
Skin
Found in palm and soles of feet.
Glabrous / Non-hairy
Any part of the skin that does not have hair follicles and sebaceous glands.
Glabrous / Non-hairy
Has a very thick epidermis.
Glabrous / Non-hairy
Encapsulated organ in the dermis.
Glabrous / Non-hairy
Found in any part of the body where hair growth occurs.
Hairy
Any part of the skin that has hair follicles and sebaceous glands.
Hairy
FUNCTIONS OF THE SKIN:
- Body temperature regulation
- Protection
- Vitamin D production
- Excretion
- Sensation
Removal of waste and excess fluids in our body.
Excretion
Major way to maintain body homeostasis
Excretion
Skin allows an individual to touch and feel certain things.
Sensation
In an average adult, skin covers a
surface area in excess of ______
2 m2
With the exception of the skeletal muscles, the _______ is the heaviest organ of the body.
Skin
T/F: The skin varies in thickness between the palms and soles of the feet, where it is very thick, to the fine delicate skin on the face.
TRUE
Two types of skin
glabrous and hairy
Found on the palms and soles of the feet, lacks hair follicles and sebaceous glands but has a very thick epidermis and encapsulated sense organs in the dermis.
Glabrous skin
Hair follicles and sebaceous glands are both present, but there are no encapsulated sensory organs.
Hairy skin
Skin protects underlying structures from
- Ultraviolet (UV) radiation
- Dehydration
Needed for calcium absorption
Vit. D
Small amounts of waste products are lost through ____________
perspiration
If too hot, dermal blood vessels ________
dilate
An avascular structure, made up of many layers of cells.
epidermis
If too cold, dermal blood vessels ___________
constricts
The special structure of the epidermis is classified as ____________________________ and is typical of vertebrate animals.
cornified stratified squamous epithelium
Responsible for producing the main barrier
Epidermis
Forms the outermost part of the epidermis.
horny layer or stratum corneum
The horny layer is made up of water-resistant dead cells, called ________
corneocytes
Characterized by the presence of distinctive keratohyalin granules
stratum granulosum or granular layer
Layers of epidermis in chronological order
corneum - lucidum - granulosum - spinosum - basale
Lower living layers of the epidermis
- germinative or basal layer;
- stratum spinosum or prickle
cell layer; - stratum granulosum or
granular layer
dynamic process of epidermal renewal
Keratinization
Keratinization begins in the __________
basal layer
Due to wear and tear, these cells in the horny layer are lost to the environment in a process called ___________
desquamation
supports the sensory nervous system, secretory glands and hair follicles
dermis
Functions as a supporting frame to the epidermis
dermis
Unlike the epidermis, which is a cellular structure, the underlying dermis consists of _____________
connective tissue
Compositions of Dermis:
- Collagen and elastin
- Ground substance
- Mast cells
- Sweat glands
- Sensory skin receptors
major constituent of the fibrous protein which gives the skin its tensile strength
collagen
These collagen fibres make up ______ of the wet weight of the dermis and are arranged largely as interwoven strands.
30%
makes up a smaller percentage and tends to be interwoven among the
collagen bundles
elastin
allow the skin to deform and return to its original state once the pressure or tension is removed
elastin
consists of salt, water and glycosaminoglycans
ground substance
The dermal ground substance consists of ________, ________, and _______________.
salt, water, and glycosaminoglycans
The best-known examples of ‘glycosaminoglycans’
hyaluronic acid and chondroitin sulfate
Known to play a vital role in the hydration of tissues since it carries with it a large volume of water
Hyaluronic acid
Second major cell type in the dermis, can be found close to the small blood vessels
mast cells
They are responsible for synthesis and secretion of
(a) heparin, which is an anticoagulant,
(b) histamine and
(c) prostaglandins, both of which have vasoactive properties
mast cells
both of which have vasoactive properties
histamine and prostaglandin
Below the epidermis is a layer of fatty or adipose tissue called the ____________
hypodermis
The cells in this layer synthesize and store fat as an energy reserve.
hypodermis
provides the body with its contours,
whether they are attractive curves or unwelcome bulges
hypodermis
soft smooth skin with a healthy appearance
normal skin
fine texture, flaky, many expression lines, poor elasticity
dry skin
shiny with enlarged pores, often blemished
oily skin
florid with broken capillaries, fine textured, like dry skin
sensitive skin