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Earwax is a naturally produced secretion that protects the ear canal. It is a mixture of skin, sweat, hair, and debris (such as

An echocardiogram (echo) is a type of ultrasound examination that uses high-pitched sound waves sent through a device called a

E. coli is a type of bacteria that lives in the digestive tracts of humans and animals. There are many types of E. coli, and most

An ectopic pregnancy happens when a fertilized egg starts to grow somewhere other than the uterus, usually in a fallopian tube.

An electromyogram (EMG) is a test that measures the electrical activity of your muscles. It can determine whether muscle weakness

An electroencephalogram (EEG) is a procedure that measures the electrical impulses in the brain. An EEG is done by placing small

An electrocardiogram (EKG, ECG) is a test that measures the electrical signals that control heart rhythm. The test measures how

Electrolytes are minerals found naturally in the body, such as potassium, calcium, sodium, and magnesium. Electrolytes are needed

When a fertilized egg has implanted in the uterus, the group of cells that will become a baby is called an embryo. A developing

Eating disorders are conditions that cause a person to have unhealthy thoughts, feelings, and behaviors related to food and body