Quiz: Can You Figure Out the Organ From These Clues?
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Can You Figure Out the Organ From These Clues?
By: Torrance Grey
Image: Shutterstock

About This Quiz

In school, you probably learned that organs are the body's "machines" -- they are active, serving a function, and often complex in structure. This is easy to see when we're talking about the body's "rock star" organs: the brain, heart, lungs, liver and kidneys. 

But things are a little more complicated than that. (Aren't they always?) Not everyone can even agree on how many organs the body has. Is it 50? Or even more than 70? To get to that higher number, 78, you have to count all the glands, as well as parts of the body we don't think of as very active or machine-like. Take the bladder, for example. You're probably used to thinking of it as a mere holding tank, but it's classed as an organ. There are some organs you can even do without, like the spleen. 

If you're nostalgic for your old health-science class, we've got a quiz for you. We'll provide a picture, and you identify the organ. We'll also provide a hint if you get stuck... which you might, even if you love biology. We get into quite a few of the glands and lesser-known organs. 

Are you up to the challenge?

1.0 of 38
Which organ is shown in this image? (No, it's not your "thinking cap"!)

The brain isn't the largest organ, but it's arguably the most important. It regulates the function of all other organs, whether autonomically (heartbeat) or deliberately (breathing).

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Which "tasteful" organ is shown in this picture?

Yep, the tongue's an organ. A sense organ, to be exact, and one of the body's important "gatekeepers" in terms of food.

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Can you see which organ this is?

The eye is a complex machine. Its diseases are treated by an ophthalmologist (not to be confused with an optometrist, who deals with vision and prescribes glasses or contacts).

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Do you know what the arrow is pointing to?

The pharnyx is part of the digestive system, located in the throat. Aptly, its name is Greek for "throat."

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Which organ -- well, "organs," plural -- are shown in this image?

Many people view the lungs as big balloons, simple in structure. They're actually filled with dense, light structures (alveoli), like a honeycomb.

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What is this organ we sometimes blame for our unhealthy cravings?

The stomach is an organ that takes a lot of abuse. We don't appreciate its hard work until we begin to have problems with it, like acid reflux.

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This looks like something that came out of a meat grinder, but what organ is it, actually?

The small intestine is responsible for much of the digestive process. It is divided into the ileum, duodenum and jejunum.

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Which digestive organ is shown here?

What? An organ can be part of another organ? It's true. The duodenum is the first segment of the small intestine, and the first place your food goes after the stomach.

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What is this digestive organ called?

The jejunum comes just after the duodenum in the small intestine. Sidenote: Bonus points if you recognized the other three names as adapted from cryptocurrencies. (Everyone likes an Easter egg once in a while)

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What big organ are you looking at?

The large intestine is virtually the end of the digestive process. Before, well, you know. It removes water from bodily waste before the rest becomes feces.

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What blood-filtering organ is this?

The liver, along with the kidneys, is the body's detoxification system. Together, they render those expensive "detox programs" largely unnecessary.

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What is this funny-looking organ?

The gallbladder stores bile, which is important to the digestive process. Even so, you can have your gallbladder removed without too much inconvenience to your day-to-day life.

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Which organ, a gateway to the digestive tract, is shown here?

The esophagus is the long tract that carries food down to your stomach. Though it might seem like a passive "chute," it actually uses peristaltic contractions to move food along.

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What exactly are you looking at here?

The larnyx is responsible for sound production, or more simply, voice. That's why larynx problems hit singers so hard.

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Which well-known organ, beloved by poets, is this?

How did this tough, essential organ become synonymous with love and passion? We're not sure - it's essentially a big hydraulic pump.

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Which essential organs, with a function similar to the liver, are shown in this image?

Kidneys are bean-shaped organs that filter and detoxify the blood. They're also among the most commonly donated organs.

17.0 of 38
What is this butterfly-like organ?

The thyroid is a butterfly-shaped gland in your throat. Problems with it are not uncommon, but treatable with hormones.

18.0 of 38
Which organ is this funny-looking little guy?

The pancreas is one of the better-known glands (a gland is an endocrine, or hormone-regulating, organ), thanks to its role in diabetes. When the pancreas does not produce enough insulin from very early in life, that's known as Type I Diabetes, as opposed to Type II, often brought on by excess weight and lack of exercise.

19.0 of 38
Which reproductive gland/organ is shown here?

The ovary is a gland. Responsible for far more than fertility, it produces hormones essential to energy and well-being in women.

20.0 of 38
Which reproductive organ is shown in this picture?

Far more than a passive storage chamber, the uterus is a reproductive organ. During intercourse, it directs blood flow to the vagina, which is an important part of sexual responsiveness.

21.0 of 38
We feel sometime-urgent signals from this organ daily. What is it?

Technically, we should call this the "urinary bladder" to differentiate it from the gallbladder. Or the swim bladder, which fish have.

22.0 of 38
Which excretory organ are you looking at?

These run from the kidneys down to the bladder. They're also a common site where kidney stones develop. Ouch!

23.0 of 38
Look closely -- what organ is shown in this picture?

As the name implies, this narrow organ is used in urination. In males, it's also the conduit for semen.

24.0 of 38
Which organ, important to emotional regulation, is shown in this image?

Okay, it's a nerve - but we're including it because the vagus nerve is so powerful in regulation of emotion. It secretes neurotransmitters and can cause, in moments of great stress, fainting or loss of bladder control.

25.0 of 38
Which organ, on the surface of a larger one, is shown in this image?

Okay, this is another "not quite an organ." Except it is, when it comes to transplantation - corneas are routinely recovered for re-use, like hearts and kidneys.

26.0 of 38
Will you be so mad you could spit if you don't correctly guess this organ?

The parotid gland secretes saliva, which is important to digestion, as well as general comfort. Vaccination has led to a sharp decrease in infections causing swelling of the parotid glands - commonly known as "mumps."

27.0 of 38
What organ, the site of a common late-in-life cancer, is this?

In healthy men, it's about the size of a walnut. Enlargement tends to occur with age.

28.0 of 38
Which very important endocrine organ is shown here?

The pituitary gland is tiny but mighty. About the size of a pea, it's deep in the base of your brain and regulates the function of many other glands in the body.

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What organ -- also a tiny-but-might gland -- is this?

The pineal gland, in the brain, produces melatonin, which regulates sleep. However, there's also a lot of pseudoscience about what the pineal gland does - including, supposedly, releasing a large amount of DMT at point of death. Proceed cautiously when analyzing such claims.

30.0 of 38
What "exciting" organ is seen here?

You probably know this gland because of the hormone "adrenalin," associated with excitement and stimulation. Technically, we should say "glands," as there's one atop each kidney.

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Which organ is this little guy?

The thymus. along with bone marrow, constitutes the body's immune system. That is, it produces antibodies that attack infectious agents.

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What organ, important to blood-cell production, is this?

Okay, you could say bone marrow is just a "tissue," but it's very biologically active. It creates blood cells, and since white blood cells fight infection, bone marrow is also a key player in the immune system.

33.0 of 38
What organ, which you can live without, is seen here?

As part of the "four humours" theory of medicine, the Greeks thought that an overbalance of spleen fluids cause someone to get angry easily. This is why you'll still sometimes hear the phrase "vent your spleen" for "get something off your chest."

34.0 of 38
What are these, sometimes removed in childhood, called?

The tonsils, like the spleen, are something that humans can get along without. Some of us grew up hearing, jealously, about all the ice cream patients were allowed to eat post-operation (ice cream being gentle on the throat, the site of the surgery).

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Which organ, a player in immune response, is shown in this image?

The lymphatic system, including the lymph nodes, is part of the body's "acquired" immune system. They filter foreign bodies like cancer cells.

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What organ, the largest in the body, is this?

Though we don't always think of it this way, skin is the largest organ. It plays a vital role in protecting the body from pathogens and regulating body temperature.

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Which male reproductive organs are shown in this picture?

Stop giggling; this is science! The testis (plural "testes") is the analogue of the female ovary, creating sperm. It's an essential part of the reproductive system.

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What are these, simply called "oviducts" in animals?

The Fallopian tubes carry egg cells from the ovaries to the uterus. They are named for an Italian scientist, Gabriele Fallopio, who thought they resembled tubas. (Okay, that's not very dignified!)

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