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Anatomy and Physiology of the Skin
Study notes for the first quiz
Terms in this set (19)
What are the functions of the skin?
protection, heat regulation, absorption, sensation, excretion, secretion
What are Keratinocytes?
any cells in the skin, hair or nails that produces keratin
What are Melanocytes?
cells in the epidermis that produce pigment and protect the skin from ultraviolet light
What is Hypodermis/subcutaneous tissue?
is the cushion layer that protects internal organs from blows, controls heat regulation, and body contour
What are the 3 types of fibres found in the dermis?
collagen, elastin and reticulin
What are receptors?
mediate touch, position, pressure, temperature and pain
What are the 5 senses recognized by the skin?
touch, cold, heat, pain and pressure
What are the two types of sweat glands?
Eccrine sweat glands and apocrine sweat glands
Which type of sweat gland is considered the true sweat gland?
Eccrine sweat glands are true sweat glands found all over the body
Where are most apocrine sweat glands found in the body?
Apocrine sweat glands are concentrated in auxillary (underarms)
What do sebaceous glands secrete?
Sebaceous glands secrete sebum (oil)
Describe the Epidermis
contains no blood vessels or nerves and is vital in preventing water loss , has 5 layers, is continually replacing itself, and is thickest on the palms and soles and thinnest on the eyelids
What are the 5 layers of the Epidermis?
stratum coneum, stratum lucidum, stratum granulosum, stratum spinosum and stratum germativium
Define the Stratum Corneum
is the superficial layer, is polished by microdermabrasion, contains compound NMF, keeps the skin soft and moisturized and is composed of amino acids, and filaggrin
Define the Stratum Lucidum
is a thin, clear band which is prominent in areas of thick skin and absent in others
Define the Stratum Granulosum
signals transition of the cells within it, keratin loses nuclei and organellesbecoming flat before moving farther up towards the stratum corneum
Define the Stratum Spinosum
the spiny sublayer just below the stratum ganulosum contains cells that create an immune response to protect the body against foreign bodies that get through the first three outer sublayers of skin
Define the Stratum basal
Also known as the basal cell layer, the deepest live layer of the epidermis that produces new epidermal skin cells and is responsible for growth
What are the 2 specialized cells in the epidermis?
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