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Allergens: Animals
Household pets, such as cats and dogs, are the most common sources of animal allergens. Here's what you need to know about symptoms and treatments.
Allergens: Dust and Dust Mites
Dust mites are microscopic organisms that can live throughout homes and businesses. Read on to learn more.
Allergens: Pollen
Pollen is the most common cause of hay fever. Read on for more information--and helpful tips for reducing the effects of hay fever during pollen season.
Allergy Overview
Allergies are problems of the immune system. Normally the immune system attacks harmful things such as viruses or bacteria. But sometimes it overreacts and responds to things that are normally harmless. These may include dust, mold, pollen, or food.
Alternatives to Alcoholics Anonymous
Today there are alternatives to 12-step programs. Some treatment programs teach problem drinkers to reduce their drinking. This approach appeals to people who otherwise might not seek treatment.
An Early Start to Good Nutrition
With childhood obesity on the rise, should parents worry about the weight of their babies?
Anatomy and Function of the Urinary System
Detailed anatomical description of the urinary system, including simple definitions and labeled, full-color illustrations.
Anatomy of a Joint
Joints are the areas where 2 or more bones meet. Most joints are mobile, allowing the bones to move.
Anatomy of Female Pelvic Area
The female pelvic area contains a number of organs and structures: the endometrium, uterus, ovaries, cervix, vagina, and vulva.
Anatomy of the Breasts
A closer look at the structure of the breast.
Anatomy of the Endocrine System
The endocrine system is a complex network of glands and organs. It includes the hypothalamus, pancreas, ovaries, and testes, along with the pituitary, thyroid, and other glands.
Anatomy of the Eye
The structures of the eye include the cornea, iris, pupil, macula, retina, and the optic nerve.