Conditions

The ovaries are a pair of glands. They're part of the female reproductive system. But what do they do, exactly? Let's take a moment to learn about them.

Your hypothalamus is a small hormone-producing area of your brain. It helps your body in many ways. But what does it do, exactly? Let's take a moment to learn more.

This network of organs, tissues and vessels is a key part of your body's immune system. It collects and moves a watery fluid called "lymph," which is expelled by your body's tissues. Lymph is full of waste and germs. Your lymphatic system fights these germs. It filters and cleans lymph and sends it to your bloodstream. Let's take a moment to learn more.

This is when you don't have enough iodine in your body. Iodine is a mineral you need to stay healthy. It's used by your thyroid gland to make thyroid hormones. Without these hormones, you can have a wide range of problems. Let's take a moment to learn more.

This is a problem with your parathyroid glands. These are four tiny glands in your neck. They make parathyroid hormone (we call it "PTH"). It controls the amount of calcium in your blood. With this disease, the parathyroids make too much or too little PTH. Let's take a moment to learn more.

Your parathyroids are a group of four small glands at the base of your neck. But what do they do, exactly? Let's take a moment to learn more.