integumentary system Flashcards
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Basal layer
Deepest layer of the epidermis. Is composed if living cells where new cella are formed.
Stratum corneum
Is composed of dead flat cells that lack a blood supply and sensory receptors.
Ductule
Very small duct.
Keratin
As new cells move toward the stratum corneum to replace the cells that have been sloughed off, they die and become filled with a hard protein material called keratin. Relatively waterproof, prevents body fluids from evaporating and moisture from entering the body
Melanin
Provides a protective barrier from the damaging effects of the sun’s ultraviolet radiation. Melanocytes produce the black pigments.
Sebaceous
Oil glands mostly in hair follicles
Sudoriferous
Sweat glands. Located in the dermis. Secrete perspiration onto the surface of the skin through the pores.
Exocrine glands
They secrete substances through ducts to an outer surface of the body rather that directly into the bloodstream like endocrine glands
Axillae
Armpits
Hair shaft
The visible part of the hair
Hair follicle
The coverings of the root
Papilla
At the bottom of the follicle is a loop of capillaries enclosed.
Alopecia
(Baldness) occurs when the hairs of the scalp are not replaced because of death of the papillae.
Nail root
Is composed of keratinized stratified squamous epithelial cells producing a very tough covering.
Nail bed
As the nail grows, it stays attached and slides forward over the layer of epithelium called the nail bed.
Lunula
The half moon shaped area at the base of the nail.
Lip/o
Lipocele- hernia containing fat
Steat/o
Skin
Ex. Steatitis- inflammation of fatty(adipose) tissue
Hidr/o
Sweat
Ex. Hidradenitis-inflammation of the sweat glands
Sudor/o
Sudoresis- profuse sweating
Ichthy/o
Ichthyosis(ik-thy-o-sis)- abnormal condition of dry or scaly skin.
Kerat/o
Horny tissue; hard, cornea
Ex. A thickened area of the epidermis or any horny growth on the skin, such as a callus or wart.
Myc/o
Fungus
Ex. Dermatomycosis(der-ma-to-mi-ko-sis) fungal Infection of the skin.
Onych/o
Nail
Ex. Onychomalacia(on-i-ko-ma-la-she-a) softening of the nails
Ungu/o
Ungual(ung-gwal) pertaining to the nails
Trich/o
Trichpathy- disease involving the hair
Seb/o
Sebum
Ex. Seborrhea- an excessive secretion of sebum from the sebaceous glands
Squam/o
Scale
Ex. Squamous- pertaining to scales
Xen/o
Foreign,strange
Ex. Xenograft- skin transplantation from a foreign donor (usually a pig) for a human. Used as a temporary graft to protect the patient against infection and fluid loss.
Dia
Through, across
Ex. Diaphoresis- excessive or profuse sweating; also called sudoresis or Hyperhidrosis
Phoresis- carrying; transmission
Lesions
Are areas of tissue that have been pathologically altered by injury, wound, or infection.
They may be localized(a certain area or definite size) or systemic(widely spread throughout the body)
Primary skin lesions
Flat or elevated
Secondary skin lesions
Are changes that take place in the primary lesion due to infection, scratching, trauma, or various stages of a disease.
First degree burn
Are the least serious type of burn because they injure only the top(superficial) layers of the skin, the epidermis.
Thermal burn
Dry or moist heat burn
Erythema
Skin redness
Hyperesthesia
Acute sensitivity to sensory stimuli
Second degree burn(partial thickness)
Are deep burns that damage both the epidermis and part of the dermis.
Third degree burn
The epidermis and dermis are destroyed and some of the underlying connective tissue is damaged, leaving the skin waxy and charred with insensitivity to touch.
Neoplasms
Are abnormal growths of a new tissue that are classified as benign or malignant.
Immunotherapy Aka biotherapy
Treatment that stimulates the body’s own immune defenses to fight tumor cells.
The tumor,node,metastasis(TNM)
System of staging is used to identify the invasiveness of the malignant tumor.
Basel cell carcinoma
The most common type of skin cancer, is a malignancy of the basal layer of the epidermis, or hair follicles. This type of cancer is commonly caused by overexposure to sunlight.
Carcinogens
Cancer causing agents
Squamous cell carcinoma
Arises from skin that undergoes pathological hardening(keratinizing) of epidermal cells. It is an invasive tumor with potential for metastasis and occurs most commonly in fair-skinned white men over age 60.
Malignant melanoma
Is a neoplasms composed of abnormal malabo urea that commonly begin In a darkly pigmented mole.