Ultimately, melatonin has the ability to entrain biological rhythms and has important effects on reproductive function of many animals. The light-transducing ability of the pineal gland has led some to call the pineal the “third eye”.

The third eye allows for clear thought, spiritual contemplation, and self-reflection. It is the highest chakra in the physical body, allowing it to provide visionary perspective. The third eye also helps to determine one’s reality and beliefs based on what one chooses to see in the world.

Pineal Gland

You can still have a fairly normal life without one of your lungs, a kidney, your spleen, appendix, gall bladder, adenoids, tonsils, plus some of your lymph nodes, the fibula bones from each leg and six of your ribs.

Here are some of the “non-vital organs”.

• Spleen. This organ sits on the left side of the abdomen, towards the back under the ribs.
• Stomach.
• Reproductive organs.
• Colon.
• Gallbladder.
• Appendix.
• Kidneys.

15 Parts of the Human Body That Will Disappear in the Future

• Body hair. Our brows help keep sweat from our eyes, but male facial hair plays an equally important role in sexually attracting the opposite sex.
• Paranasal sinuses.
• Extrinsic ear muscles.
• Wisdom teeth.
• Neck rib.
• Palmaris muscle.
• Male nipples.
• Arrector pili muscles.

For example, if you didn’t have a ribcage, your heart would be very vulnerable. Bones also store essential body minerals, and bone marrow produces new cells for our bloodstream.

The liver performs essential, life-sustaining functions. While you can’t live without a liver completely, you can live with only part of one. Many people can function well with just under half of their liver. Your liver can also grow back to full size within a matter of months.