Blackhead
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  Blackhead



Blackhead

    A non-inflammatory acne lesion that is filled with excess oil and dead skin cells. Blackheads are also called “open comedomes” because the surface of the skin remains open.

RELATED TERMS
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Acne
Is a common inflammatory disease of the facial skin seen most frequently between the ages of 10 and 25 years and characterized by blackheads, whiteheads and blemishes composed of papules and pustules. Acne is an inflammatory disease of the sebaceous glands, the glands that produce sebum. Acne usually affects the face, back, and chest. In severe cases it can develop into cysts and nodules that can result in scarring. While its cause is unknown, it is most often associated with hormonal activity within teenagers. In severe cases a person should consult with a dermatologist for a specific acne treatment.

Lesion
Injury of bodily tissue due to infection, trauma or neoplasm

Skin
Skin is an organ of the integumentary system; which is composed of a layer of tissues that protect underlying muscles and organs. Skin is used for insulation, vitamin D production, sensation, and excretion (through sweat).



SIMILAR TERMS
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Black American
See: African American.

Black Death
The Medieval black plague that ravaged Europe and killed a third of its population. It was due to the plague which is caused by a bacterium (Yersinia pestis) transmitted to humans from infected rats by the oriental rat flea.

Black eye
Bruising of the eyelid and/or under- eye area as a result of trauma to the eye. Colloquially called a shiner.

Black hairy tongue
Elongated papillae on the tongue, promoting the growth of microorganisms.

Black henna
A tattoo ink and paste consisting of henna with other ingredients added, sometimes including para-phenylenediamine (PPD). Allergic reactions to PPD include a red rash, contact dermatitis, itching, blisters, open sores, scarring of the skin and other potentially harmful effects. Allergic reactions to PPD may also lead to sensitivity to other products such as hair dye, sun block and some types of black clothing. Also called blue henna.

Black Hills Medical Center
The Black Hills Medical Center is a hospital in Deadwood, South Dakota, United States.

Black Hills Rehabilitation Hospital
The Black Hills Rehabilitation Hospital is a hospital in Rapid City, South Dakota, United States.

Black lung disease
A chronic occupational lung disease contracted by the prolonged breathing of coal mine dust. The silica and carbon in the coal dust cause black lung disease. About one of every 20 miners studied in the US has X-ray evidence of black lung disease, a form of pneumoconiosis.

Black plague
"In 14th-century Europe, the victims of the ""black plague"" had bleeding below the skin (subcutaneous hemorrhage) which made darkened (""blackened"") their bodies. Black plague can lead to ""black death"" characterized by gangrene of the fingers, toes, and nose. Black plague is caused by a bacterium (Yersinia pestis) which is transmitted to humans from infected rats by the oriental rat flea."

Black River Hospital
The Black River Hospital is a hospital in St Elizabeth, Jamaica.

Blackburn doctors
All doctors near Blackburn, Great Britain. Doctors who can assist a patient in Blackburn.

Blackout
1. Short-term loss of vision and consciousness. 2. In an alcoholic person, loss of memory for a period of time.

Blackpool doctors
All doctors near Blackpool, Great Britain. Doctors who can assist a patient in Blackpool.

Blackrock Clinic
The Blackrock Clinic is a hospital in Dublin Ireland.

Blacktown Hospital
The Blacktown Hospital is a hospital in Blacktown, New South Wales, Australia.

Blackwell
See: Blackwell, Elizabeth.

Blackwell, Elizabeth
1821?1910) The first woman to receive a medical degree from an accredited American college. Blackwell was born in Bristol, England. Her father was a nonconformist, liberal, and abolitionist. In 1832 with her family, she immigrated to Cincinnati, Ohio. Blackwell decided to become a doctor in 1844 after a family friend dying with cancer said that she would have suffered less if she had been cared for by a female physician. In 1844, Blackwell visited a family friend who was dying of cancer and who told her how much she had suffered from the humiliation of being treated by male doctors.



PREVIOUS AND NEXT TERMS
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Bone
Bone refers either to a hardened connective tissue or to one of the individual structures, or organs, into which it is formed, found in many animals. Bones support body structures, protect internal organs, and (in conjunction with muscles) facilitate movement; are also involved with cell formation, calcium metabolism, and mineral storage. The bones of an animal are, collectively, known as the skeleton.

Blastocyst
The developmental stage of the fertilized ovum by the time it is ready to implant; formed from the morula and consists of an inner cell mass, an internal cavity, and an outer layer of cells (the trophoblast).

Bacteriostatic
Able to inhibit the growth and reproduction of at least some types of bacteria.

Birth control pill
Oral contraceptives are contraceptives which are taken orally and inhibit the body's fertility by chemical means. Female oral contraceptives have been on the market since the early 1960s. Male oral contraceptives remain a subject of research and development, and are not available widely (if at all) to the public. Studies continue of various alternatives, such as gossypol.

Breast enlargement pill
Breast enlargement pills have recently appeared in the market. Their purpose is to help women develop larger breasts.

Blackhead

Beta catenin
A protein that is associated with cells that are destined to become hair follicle cells.

Barbiturate
A salt or derivative of barbituric acid used medicinally as a sedative, sleeping pill, or anticonvulsant; and among street drugs used as a "downer."

Barr body
The color-staining spot (the sex chromatin) located at the edge of the nucleus of cells taken from individuals with more than one X chromosome. It is normally found in female cells, and so is used as a sign of female genetic sex. It is also found in men with the 47,XXY (Klinefelter's) syndrome. It is missing in girls with the 45,X (Turner's) syndrome. The Barr-body test is rapid and inexpensive as compared with actual chromosome counting, and so is used as a method of preliminary X-chromosome screening.

Beta lipotropin
The biochemical precursor substance from which the body synthesizes endomorphins.

Biastophilia
A paraphilia of the sacrificial/expiatory type in which sexuoerotic arousal and facilitation and attainment of orgasm are responsive to, and dependent upon the surprise attack and continued violent assault of a nonconsenting, terrified, and struggling stranger [from Greek, biastes, rape or forced violation + -philia]. Acquiescence on the part of the partner induces a fresh round of threat and violence from the biastophile. Biastophilia may be homosexual as well as heterosexual, but is predominantly the latter, whether the biastophile is male or female. There is no term for the reciprocal paraphilic condition, namely stage-managing one's own brutal rape by a stranger, which probably exists only in attenuated form and rarely gets transmuted from fantasy into actuality.

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