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Anatomy of the Endocrine System The endocrine system is a complex network of glands and organs. It uses hormones to control and coordinate your body's metabolism, energy level, reproduction, growth and development, and response to injury, stress, and mood. The following are key

The Thyroid Gland Anatomy of the thyroid gland The thyroid gland is found in the front of the neck. It sits below the voice box (larynx) and on top of the trachea (windpipe). It has a butterfly-like shape. The small, 2-inch gland consists of 2 lobes, 1 on each side of the

Ear, Nose, and Throat Facts What is the ear? The ear is the organ of hearing and balance. The ear is made up of: External or outer ear. This includes: Pinna or auricle. This is the outside part of the ear. External auditory canal or tube. This is the tube that connects the outer

Tonsillitis What is tonsillitis? Tonsillitis means that your tonsils are inflamed. Your tonsils are large, fleshy glands at the back of your throat. These glands make antibodies that help fight infection. What causes tonsillitis? Both bacteria and viruses can cause tonsillitis

Air Pollution What is air pollution? Air pollution is when harmful substances are in the air that we breathe. National agencies and organizations report that: Air pollution comes from many sources. Some of these include industrial operations. Other sources are stationary fuel

Molds in the Environment What is mold? A mold is a microscopic fungus that grows and lives on plant or animal matter. It can also live on nonorganic objects. Most molds are made up of filaments. They reproduce through the production of spores. Spores spread by air, water, or

When to Get an Eye Exam What's an eye exam? During an eye exam, an eye healthcare provider looks at your health history and gives you a series of eye tests. The tests are done to check the health of your eyes. They check for problems that can develop over time, such as glaucoma

Anatomy of the Eye Anterior chamber. The front section of the eye's interior where aqueous humor flows in and out, providing nourishment to the eye. Anterior chamber. The front section of the eye's interior where aqueous humor flows in and out, providing nourishment to the eye

Low-Vision Devices What is low vision? Low vision is a condition that means your vision can't be helped with traditional eyeglasses, contact lenses, intraocular lens implants, or corrective surgery. But in some cases, people with low vision may get help with special visual

Cervical Cancer: Introduction What is cancer? We’ve all heard of cancer at some point in our lives—cancer screenings, cancer care, and maybe even cancer treatment. But what is cancer? And what steps can you take to prevent it? Cancer is a disease that begins when some cells in