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Anatomy and Function of the Urinary System How does the urinary system work? The body takes nutrients from food and changes them to energy. After the body has taken the food components that it needs, waste products are left behind in the bowel and in the blood. The kidney and

The Child's Immune System What is the immune system? The immune system protects your child's body from outside invaders. This includes germs, such as bacteria, viruses, and fungi, and toxins (chemicals made by microbes). The immune system is made up of different organs, cells

Signs of Pregnancy/The Pregnancy Test What are the signs of pregnancy? The signs of pregnancy vary from woman to woman. Usually, the most obvious sign is when a woman has a missed period. But some women continue to have bleeding even while pregnant. The following are the most

Birth Injuries What is a birth injury? Sometimes during the birth process, the baby may suffer a physical injury that impairs function or structure of their body. This is sometimes called birth trauma or birth injury. It can occur during labor, delivery, or after delivery. Birth

Common Benign Lumps What are some common types of benign breast lumps? Noncancer (benign) breast lumps can have many causes. Two of the most common causes of benign single breast lumps are cysts and fibroadenomas. Several other conditions can also appear as lumps. These are fat

Overview of Kidney Disorders How do the kidneys work? The body takes nutrients from food and converts them to energy. After the body has used all the food components that it needs, waste products are left behind in the bowel and in the blood. The kidneys and urinary system help

About the Heart and Blood Vessels The heart is the hardest working muscle in the human body. Located almost in the center of the chest, a healthy adult heart is the size of a clenched adult fist. By age 70, the human heart will beat more than 2.5 billion times. The heart is

Trinucleotide Repeats: Fragile X Syndrome What are trinucleotide repeats? DNA is the chemical that makes up your genes. It contains a "code" of 3-letter words known as codons or trinucleotides. Many genes normally contain trinucleotide sequences that repeat. These are called

Knee Pain and Problems Brief anatomy of the knee The knee is a vulnerable joint. It bears a great deal of stress from everyday activities, such as lifting and kneeling, and from high-impact activities, such as jogging and aerobics. The knee is formed by these parts: Tibia. This

Breast Cancer: Diagnosis How is breast cancer diagnosed? If your health care provider thinks you might have breast cancer, you will need certain exams and tests to make sure. Diagnosing breast cancer starts with your provider asking you questions. They will ask about your health