Do You Know How Your Organs Work?

SCIENCE

Becky Stigall

5 Min Quiz

Image: Shutterstock

About This Quiz

The tongue, mouth, esophagus, stomach, small intestines and large intestines are all part of the digestive system. But do you know what each of these organs does? Take this quiz to see how much you know about how your organs work.

Which organ sends oxygen-deprived blood to the lungs?

The heart pumps oxygen-deprived blood to the lungs. Once the blood is re-oxygenated, the lungs send it back to the heart.

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Digestion begins in what organ?

Digestion begins in the mouth. Food is chewed and mixed with saliva.

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Which organ serves as the body's control center?

The brain serves as the body's control center. The brain corrals all of the signals the body sends and communicates with all body systems.

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Which organ filters waste from the body?

The kidneys filter waste from the body. The kidneys make urine by mixing urea and water.

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Which organ is the body's first defense against pathogens?

Your skin is the body's first defense against pathogens. Skin is also the body's largest organ.

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Which organ is home to the body's white blood cells?

The spleen is home to the body's white blood cells. The spleen is located on the left side, under the ribs.

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What organ stores urine?

The bladder stores urine. It is a small sac that expands to store urine and contracts to expel urine.

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In what organ does blood exchange carbon dioxide for oxygen?

Blood exchanges carbon dioxide for oxygen in the lungs. The heart pumps blood into the lungs, then pumps re-oxygenated blood back to the body.

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What digestive organ is a 20-foot tube?

The small intestine is a 20-foot tube. It is part of the digestive system. The job of the small intestine is to absorb nutrients from food.

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Which organ filters blood?

The liver filters harmful substances from the blood. The liver also secretes bile to aid in digestion.

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What organ produces insulin?

The pancreas produces insulin. The pancreas is part of the endocrine system.

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What organ connects the larynx to the lungs?

The trachea connects the larynx to the lungs. The trachea is also called the windpipe.

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What system is responsible for making sure that blood travels throughout the body?

The circulatory system is responsible for making sure that blood travels throughout the body. The circulatory system is made up of arteries and veins.

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What part of the skeletal system plays a critical role in digestion?

Teeth are part of the skeletal system. They aid digestion by helping to break down food.

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What small organs are part of the immune system?

The lymph nodes are part of the body's immune system. Lymph nodes make and store fluids that help fight infection.

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What organ secretes hormones that regulate metabolism?

The thyroid secretes hormones that regulate metabolism. The thyroid is a butterfly-shaped organ at the base of the throat.

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In what part of the digestive system is waste stored before elimination?

Waste is stored in the colon prior to elimination. The colon is also called the large intestine. The large intestine is about five feet long.

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Where is bile stored?

Bile is stored in the gallbladder. Bile is produced by the liver.

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What organ secretes saliva, which aids in digestion?

The mouth secretes saliva, which aids in digestion. The mouth, teeth and saliva all work together at the beginning of the digestive process to break down food.

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What tissue manufactures white blood cells?

White blood cells are manufactured in bone marrow. Some marrow makes stem cells, which are important for fighting disease.

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What tube helps remove urine from the body?

The urethra is a tube that allows urine to exit the body. The urethra is about two inches long in women and about eight inches long in men.

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What organ regulates growth?

The pituitary gland helps regulate growth. This gland is the size of a pea.

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What membrane holds the intestines to the abdominal wall?

The mesentery, or mesenteric membrane, holds the intestines to the abdominal wall. There is some debate as to whether this structure is actually an organ.

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What tube moves food from the mouth to the stomach?

The esophagus moves food from the mouth to the stomach via a series of contractions. Food is now a small mass, ready for digestion.

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What organ stores eggs in the human female?

The ovaries are responsible for storing eggs in the human female. The ovaries are part of the female reproductive system.

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What organs in the throat are part of the immune system?

The tonsils are part of the immune system. The surgical removal of the tonsils is called a tonsillectomy.

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What organ enables us to see?

The eyes enable us to see. Eyes sense light and pressure.

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Which organ secretes gastric juices, which help break down food?

The stomach secretes gastric juices, which help break down food and kill bacteria. It takes the stomach a couple of hours to turn food into a thick paste, called chyme.

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What organ contracts to draw air into the lungs?

The diaphragm contracts to draw air into the lungs. This organ is also called the thoracic diaphragm.

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In what organ does the human fetus grow?

The human fetus grows inside the female uterus. The uterus is part of the female reproductive system.

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What organ aids in balance?

In addition to hearing, the ears help facilitate balance. The ears are part of the vestibular system.

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Once the stomach has finished turning food into paste, it dumps the mixture into what organ?

Once the stomach has finished turning food into paste, it dumps the mixture into the duodenum. The mixture is then blended with fluids from the gallbladder and the pancreas and sent on its way.

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What organ moves food to the back of the mouth, to be swallowed?

The tongue moves food to the back of the mouth, to be swallowed. The tongue aids in digestion and taste.

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What organ provides nutrition to the human fetus?

The placenta provides nutrition to the human fetus. The word placenta stems from Latin word for cake.

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What organ helps make sound?

The larynx helps make sound. The larynx also helps with breathing. The epiglottis helps prevent food from entering the windpipe and lungs.

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