Can you guess what these 25 organs do in your body?

MarinaGrigorivna // Shutterstock Although humans have lived with the same bodies for millennia, we are still exploring and uncovering new parts, processes, and functions every year. Researchers continue to discover new organs; for example, mesentery, which was previously thought to be a fragmented series of tissues, was reclassified as a single organ in 2017. What’s more, procedures to repair organs are also evolving rapidly. Just last March, doctors were able to perform groundbreaking brain surgery on a baby–while she was still in the womb. There are 79 organs in the human body, spanning the muscular, nervous, endocrine, skeletal, cardiovascular, lymphatic, respiratory, digestive, urinary, and reproductive systems. But not all organs are created equal. Of these, five are considered vital: the brain, heart, kidneys, liver, and lungs. While these heavy hitters keep us alive and functioning, there are plenty of organs we can live without. The appendix, spleen, reproductive organs, and colon are just a few of the many organs that, while helpful to our bodily processes, aren’t necessary for survival. In 2021, a record high of 41,354 organ transplants took place in the U.S., including 24,669 kidney transplants, 9,236 liver transplants, and 3,817 heart transplants. Stacker compiled a quiz on what 25 major organs do for your body. Read on to see what you know about human anatomy. Clue 1: This organ detoxifies your blood SeventyFour // Shutterstock This cone-shaped organ rests in the upper right of the abdomen, between the diaphragm and the stomach. Liver Mahyuddin Mustafa // Shutterstock The liver processes all the blood that travels out of the stomach and intestines. During this process, the organ excretes bile, regulates chemical levels, creates nutrients, and metabolizes drugs. These are just some of the more than 500 vital functions the liver performs, which also include preventing blood from clotting and producing cholesterol. Clue 2: This organ digests your food Joshua Resnick // Shutterstock This organ is the longest piece of the gastrointestinal tract that food travels through on its way out of the body. It connects to a larger copy of itself, but the majority of digestion takes place here. Small intestine Teeradej // Shutterstock It can take up to five hours for the small intestine to complete all of its digestive tasks, which include breaking food down, absorbing its nutrients, extracting water, and then passing food along to the large intestine. The small intestine is food’s first stop immediately after leaving the stomach; most of the digestion process takes place here. Clue 3: This organ is often called useless, but may be important for immunity Me Dia // Shutterstock Many people get this finger-shaped organ removed after experiencing inflammation–however, this hasn’t been observed to have any negative side effects on the body. Appendix Choksawatdikorn // Shutterstock Also part of the gastrointestinal tract, the appendix is located in the lower abdomen and attached to the large intestine. However, it hasn’t been observed to play any role in aiding digestion. It is thought that the appendix may promote immune system health by producing immunoglobulin A. Clue 4: This organ filters fluids leaking from blood vessels Linda21 // Shutterstock Your immune system contains hundreds of these organs, which are small and shaped like a bean. Lymph node