The Doctors reveal which body parts you can live without and why you still need to take care of them.
Replacing Body Parts
A patient recently became the first to receive a synthetic organ when a lab-made trachea was implanted in a 36-year-old man. The Doctors discuss the progress that has been made using stem cells to grow replacement body parts and the possibilities for the future.
The department of nanotechnology and regenerative medicine at University College London often is called "the human body parts store." The team uses stem cells and synthetic materials to grow replacement organs and body parts.
A witness recently became so upset while testifying that his prosthetic eye popped out, disturbing the jurors and leading the judge to call a mistrial. The Doctors discuss how to protect your eye after an injury and help save your eyesight.
Body Parts You Can Live Without
Pediatrician Dr. Jim Sears hits the streets of Los Angeles to find out if people know what different body parts are for — and whether you can live without them.
OB/GYN Dr. Lisa Masterson explains when nipples develop and why some people have extra nipples.
Do any of the 5 million hairs on our body serve a purpose? The Doctors reveal their function from head to toe. Did you know that in the future, humans may evolve to have less hair?
The Doctors explain why falling on your tailbone, or coccyx, can be so painful, and how to treat it. And, Dr. Lisa explains why it's common for women to injure their tailbone during childbirth.
Useful or Useless?
The Doctors put your body knowledge to the test. Take The Doctors' quiz: Are the following body parts useful or useless?
It marks the spot where the umbilical cord was attached while in your mother’s womb, but does it serve a purpose after birth?
Sinuses are a connected system of hollow cavities in the skull, and they can be a real nuisance when they get clogged and collect fluid. Do we need them?
The spleen is located to the left of the stomach. It often is removed for various reasons, but there can be benefits to keeping yours.
When Nonessential Organs Are Dangerous to Your Health
The gallbladder, which sits under your liver, can become painful when gallstones form, blocking the flow of bile from the liver to the small intestine. Learn how to recognize the symptoms and how to prevent the stones from forming.
The appendix, which is attached to the large intestine, might actually serve a purpose. But, when it gets inflamed, it can be extremely painful and might need to be removed. Learn about a new procedure to remove the appendix through the belly button, leaving less scarring.
When to Get It Removed
Leigh, 33, says she doesn’t want to have children and is considering getting a hysterectomy because of history of uterine problems in her family, including cancer. Dr. Lisa explains the risks and benefits of the surgery to remove a woman's uterus.
Solina says her 5-year-old son "is always coming down with a sore throat," and she wants to know if getting his tonsils removed would help. Ear, nose and throat surgeon Dr. Andrew Ordon explains the criteria used to decide when to remove tonsils.
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