A little about the "true" skin...
The Dermis, or "true" skin is 25 times thicker than the Epidermis. It provides structure and nourishment to the skin. It is made of two distinct layers: the Papillary Dermis and the Reticular Dermis.
The Papillary Dermis... think "push" as in touch as in sensory receptors! The Papillary Dermis is made up of a lot of receptors:
- Thermoreceptors ("thermostat") detect hot and cold
- Mechanoreceptors sense touch, pressure, or vibration
- Sensation receptors : There are four sensation receptors (that have really random names btw... and incidentally I thought up totally random ways to remember them...)
- Meissner's Corpuscles are responsible for light pressure and cold receptors --> a way to remember.... "M"eissner->Manilla->Vanilla->Light and Cold (like Vanilla ice cream)
- Ruffini's Corpuscles are long-term pressure and heat receptors... "R"uffini's -> Robot Dance -> Long-term and HOT (robot dances are long term and hott! haha)
- Pacinian Corpuscles are responsible for deep pressure and pain receptors ... "P"acinian -> Pain and Pressure -> deep pressure and pain
- Krause's End Bulbs are responsible for pressure and pain receptors... "K"racking Bulbs causes pressure and pain!
The Reticular Dermis is the lowest layer of the Dermis. It contains a lot of glands....
- Sweat glands (two types):
- Aprocrine glands: found in the underarms, in the genitals and in the nipples. They secrete and oderless ubstance that is triggered by emotions (oddly enough, right?). These secretions become stinky when they start to fight off bacteria on the skin (i.e. B.O.).
- Eccrine glands: are found in the entire body, but are most abundent in the forehead, palms of the hands and soles of the feet and are mainly responsible for thermoregulation (controlling/lowering the body's temperature by sweating). They are influenced by the Sympathetic Nervous System (think fight or flight... increased heart rate, blood flow, sweating, and respiration). There are two types of eccrine glands:
- Endocrine glands, which release hormones and are known as "ductless."
- and the Exocrine glands, which are similar to the sweat/sebaceous glands. They release secretions into ducts and the ducts deposit these secretions onto the surface of the skin.
- Oil (Sebaceous) Gland:
- Sebaceous glands continuously produce sebum (oil). They are found everywhere, except the soles of the feet and the palms of the hands. They are most abundent in the forehead, nose (i.e. T-zone), and back. A few interesting things about sebaceous glands...
- Sebaceous glands are attached to the upper third of each hair follicle. In facial hair there are 2-3 more sebaceous glands than there are in scalp hair follicles (which is why break-outs typically occur on the face and no in the hair).
- The amount of sebum produce is influenced by the male hormone Androgen (which is found in men and women). Since it is more abundant in men, it is common to find larger sebaceous glands in men.
Alright enough of that! Now some pictures!
Practicing some facial techniques on classmates
Group shot!
Watching Ms. Sherry do a skin analysis!
Make-up tip: brush a little of your eyeshadow over a tissue, over your lipstick and it will last longer!
And finally... a hilarious clip of a leg wax... enjoy!
And finally... a hilarious clip of a leg wax... enjoy!
Until next time!
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