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.
The heart pumps oxygen-deprived blood to the lungs. Once the blood is re-oxygenated, the lungs send it back to the heart.
Digestion begins in the mouth. Food is chewed and mixed with saliva.
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.
The kidneys filter waste from the body. The kidneys make urine by mixing urea and water.
Your skin is the body's first defense against pathogens. Skin is also the body's largest organ.
The spleen is home to the body's white blood cells. The spleen is located on the left side, under the ribs.
The bladder stores urine. It is a small sac that expands to store urine and contracts to expel urine.
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.
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.
The liver filters harmful substances from the blood. The liver also secretes bile to aid in digestion.
The pancreas produces insulin. The pancreas is part of the endocrine system.
The trachea connects the larynx to the lungs. The trachea is also called the windpipe.
The circulatory system is responsible for making sure that blood travels throughout the body. The circulatory system is made up of arteries and veins.
Teeth are part of the skeletal system. They aid digestion by helping to break down food.
The lymph nodes are part of the body's immune system. Lymph nodes make and store fluids that help fight infection.
The thyroid secretes hormones that regulate metabolism. The thyroid is a butterfly-shaped organ at the base of the throat.
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.
Bile is stored in the gallbladder. Bile is produced by the liver.
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.
White blood cells are manufactured in bone marrow. Some marrow makes stem cells, which are important for fighting disease.
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.
The pituitary gland helps regulate growth. This gland is the size of a pea.
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.
The esophagus moves food from the mouth to the stomach via a series of contractions. Food is now a small mass, ready for digestion.
The ovaries are responsible for storing eggs in the human female. The ovaries are part of the female reproductive system.
The tonsils are part of the immune system. The surgical removal of the tonsils is called a tonsillectomy.
The eyes enable us to see. Eyes sense light and pressure.
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.
The diaphragm contracts to draw air into the lungs. This organ is also called the thoracic diaphragm.
The human fetus grows inside the female uterus. The uterus is part of the female reproductive system.
In addition to hearing, the ears help facilitate balance. The ears are part of the vestibular system.
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.
The tongue moves food to the back of the mouth, to be swallowed. The tongue aids in digestion and taste.
The placenta provides nutrition to the human fetus. The word placenta stems from Latin word for cake.
The larynx helps make sound. The larynx also helps with breathing. The epiglottis helps prevent food from entering the windpipe and lungs.