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Attention-Deficit / Hyperactivity Disorder (ADHD) in Children, Adolescents and Teens What is ADHD? ADHD, also called attention-deficit disorder, is a behavior disorder, usually first diagnosed in childhood, that is characterized by inattention, impulsivity, and, in some cases

Anorexia Nervosa in Adolescents and Teens What is anorexia nervosa? Anorexia nervosa (AN), a form of self-starvation, is an eating disorder characterized by a distorted body image that leads to restricted eating and other behavior that prevents a person from gaining weight

Generalized Anxiety Disorder in Children, Adolescents and Teens What is generalized anxiety disorder? Generalized anxiety disorder (GAD) is defined as chronic, excessive worry and fear that seems to have no real cause. Children or adolescents with generalized anxiety disorder

Common Cold in Children What is the common cold in children? The common cold (upper respiratory infection) is one of the most common illnesses in children. Each year it leads to more doctor visits and missed days from school and work than any other illness. Millions of people in

Anatomy and Function of the Heart Valves What are heart valves? The heart has four chambers: two upper chambers (atria) and two lower chambers (ventricles). Blood passes through a valve before leaving each chamber of the heart. The valves prevent the backward flow of blood

Urinary Tract Infection (UTI) in Children What is a urinary tract infection (UTI) in children? A urinary tract infection is inflammation of part of the system that takes urine out of the body. It’s caused by bacteria. The urinary tract includes the 2 kidneys. They remove liquid

Vesicoureteral Reflux (VUR) in Children What is vesicoureteral reflux in children? Vesicoureteral reflux (VUR) is a condition in which urine in the bladder flows in the wrong direction. It goes up into the tubes (ureters) that lead to the kidneys. It often flows all the way back

The Lungs in Pregnancy Respiratory system The respiratory system is made up of the organs involved in the exchange of oxygen and carbon dioxide. Its main job is to move fresh air (oxygen) into your body and move waste gases (carbon monoxide) out of your body. The system includes

Acne What is acne? Acne is a disorder of the hair follicles and oil glands (sebaceous glands). The oil glands secrete oils (sebum) to keep the skin moist. When the glands get clogged, it can lead to pimples and cysts. Acne is very common. People of all races and ages have acne

Skin Pigment Disorders What are skin pigment disorders? Skin color is determined by a pigment (melanin) made by specialized cells in the skin (melanocytes). The amount and type of melanin determines a person's skin color. What is the function of melanin? Melanin's role is to