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The trachea. The thymus gland. The pulmonary vein. The pulmonary trunk.

The Human Body: Anatomy, Facts & Functions | Live Science

The bronchus. The bronchioles. The intercostal muscles. The lungs. The heart. The ribs. The diaphragm. The aorta. The liver. The gallbladder. The pancreas. Jealous much? Nature abounds with body parts that aren't found in humans.

154 734 human body organs stock photos, vectors, and illustrations are available royalty-free.

By Liz Langley. We humans like to explore the world, but sometimes we even find surprises in our own bodies.

Human body

The more we looked, the more jealous we got. The purpose of the orange light is still a mystery, Widder says. Still, portable mood lighting? Smoothest move ever. Photograph by Survivalphotos, Alamy. This stomach-like organ is located in the reproductive tract of female butterflies.

Photograph by Jeff Rotman, Alamy. Our organs are at the center of all this action. Each one is a part of a larger system and has a specific purpose that allows our bodies to perform many of life's basic functions.

Understanding Your Gallbladder

But did you know that the body is capable of carrying on without some of them? It turns out that you don't actually need all of your organs to live. Due to a combination of evolution and medical advancements, countless humans have lived and are currently living without several organs that were once thought of as vital. Here's a list of the organs you could get by without.

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The gallbladder helps digest fatty foods like grilled cheese. The gallbladder is a small sac-shaped organ whose main gig involves storing and concentrating bile aka the yellowish enzymes that help the body digest fatty foods like cheese sandwiches. Although the presence of a gallbladder is key for optimizing digestion, you don't actually need a one for your intestines to do their thing. And sometimes solid deposits of digestive fluid called gallstones can form in the gallbladder , which can cause people to feel a lot of discomfort.

If the stones become too large and too frequent, a person may have their entire gallbladder surgically removed. The only concern a person without a gallbladder needs to be wary of is their diet and possibly avoiding those high-fat foods. It won't hurt them, but they could experience digestive issues since the level of bile in their intestines will be far less concentrated. One of the spleen's primary jobs is producing blood and defense cells in developing fetuses.

But after a baby is born, the spleen's function shifts to storing blood platelets, making antibodies, and destroying abnormal cells in the blood. Since there's a lot of blood passing through the spleen at any given moment, any injuries that occur to it can be potentially fatal.

Human Organs

Often times it is a wiser decision for a person to remove their spleen entirely before it bursts and causes internal bleeding. Although you're more likely to develop certain infections when you don't have a spleen , you could technically carry on without ever replacing it.

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  8. So far they know the appendix produces immunoglobulins, which are proteins that help the immune system fight infection. However there are other organs in the body that produce lymphatic tissue for a similar reason, so the appendix isn't completely necessary for survival. In fact, a high number of adults and children have their appendix removed due to appendicitis. This is dangerous infection that can cause someone's appendix to burst if it isn't removed, almost like a ticking time bomb. Dialysis can filter your blood the way kidneys do. The kidneys are a pair of distinctly shaped organs in the urinary system.

    They play a critical role in filtering toxins out of the bloodstream and producing hormones to regulate blood pressure, which means if you lose both of them, your chance of survival is very slim. However the same is not true if you were to lose only one.

    Vocabulary : internal organs & human body

    This is why it's possible to donate a kidney while you're still alive. According to the National Kidney Foundation, one of the only concerns associated with only having a single kidney center around the possibility of something going wrong with it later in life, because you wouldn't have a backup. Moreover, it is possible to live with no kidneys, but it can be challenging since it requires a person to go on dialysis. This is a form of medical treatment that substitutes the job of the kidneys by filtering out toxins and excess water from the body.