Human Body is a Complex Collection of Organs and Systems. While you may not need these Organs to Survive but they work together to keep us Healthy.

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The human body is a complex collection of organs and systems that work together to keep us alive and healthy. Some organs, such as the heart, are necessary to sustain life. But the human body is able to survive without some organs, despite their useful functions. So today we have some body parts you can live without.

Lung
Our body is typically equipped with two lungs that are divided into sections called lobes. At least one lung is necessary to add oxygen to the blood. If all or some part of a lung is removed, the remaining lung may expand to take on some of the work of the missing lung.
A person with one lung will probably have a harder time breathing, and will not be able to exercise as strenuously as a person with two healthy lungs. But you will survive !

Spleen
The spleen is an organ that helps filter the blood. It also acts as a reservoir for immune cells called monocytes. These immune cells are important in the healing of the body after trauma such as a heart attack, a wound with excessive bleeding, or certain types of infections. People can live without a spleen, but may be more prone to certain types of infections.

Kidney
The human body normally has two kidneys, which act as filters to remove impurities in the blood. Some people are born with one kidney. Others have a kidney surgically removed, either because it is diseased or because they've chosen to donate a kidney to someone whose kidneys have failed.
It is possible to live a normal life with just one kidney. It is also possible to live with no kidneys. This is done by undergoing regular kidney dialysis which uses a machine to remove waste from the blood.

Reproductive organs
The reproductive organs of both men and women, including the testes and uterus, are necessary to create a child. But they are not necessary to sustain the life of the parent. Many people have their reproductive organs removed as a treatment for cancer or other diseases.

Stomach
Despite the body’s constant need for nourishment, it is possible to live without a stomach.People with stomach cancer or other conditions may have all or some part of the stomach removed. In this case, the small intestine is connected directly to the esophagus, allowing them to continue to eat small meals.
Dietary supplements can help fill in missing nutrients that are not absorbed as effectively without the stomach.

Colon
The colon, also known as the large intestine, is the last portion of the digestive system. The colon removes some nutrients, water and salt, and moves the remainder of the food we eat to the rectum where it leaves the body as stool.
People with cancer or other diseases of the colon may have all or some part of the colon removed. In some cases, a pouch can be made in the end of the small intestine to take the place of the colon. Other people may need to wear a bag on the outside of the body to collect stool if their colon is removed.

In general, while you may not need these organs to survive, but you need them to live a healthy and normal life