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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

Firearms Safety The importance of firearms safety About one-third of homes in the U.S. have some type of firearm. Access to firearms in the home raise the risk of unintentional firearm-related death and injury among children. Unintentional shootings cause a major portion of all

Water Safety for Parents The importance of water safety Most drownings happen in residential swimming pools. But children can drown in just 1 inch of water (such as in buckets, bathtubs, wading pools, diaper pails, toilets, hot tubs, and spas). In addition, open waters, such as

Peanut Allergy Diet for Children General guidelines for peanut allergy When your child has a food allergy, they must follow an allergy-free diet. This means your child can't have the food they're allergic to or any products that contain it. The items that your child is allergic

Preventing Falls in Children Falls are the most common cause of injury visits to the emergency room for young children. Falls cause more open wounds, fractures, and brain injuries than any other cause. Most falls happen at home. But the playground is another spot for spills

Medical Genetics: Types of Genetic Changes The human body has about 20,000 different genes in each cell. Genes are located on chromosomes, which are stick-shaped structures in the middle of the cell (nucleus). Each cell usually has 46 chromosomes grouped in 23 pairs. Each gene

Exercise for Cancer Prevention People who are overweight or obese have a higher risk of getting certain cancers. This includes cancers of the: Breast (for people past menopause). Endometrium. Ovary. Kidney. Liver. Rectum. Esophagus. Colon. Pancreas. Stomach. Thyroid. Gallbladder