Can We Live Without Oxygen?

How does our body get rid of carbon dioxide?

The answer is quite simple. Our body follows the same process that is used to bring in oxygen, just in the reverse order. While we breathe in oxygen, we breathe out carbon dioxide. Our blood delivers this waste gas to capillaries, which then gets transferred to alveoli and then our lungs. Our lungs push out the carbon dioxide gas when we breathe out. Imagine, all these activities taking place within a fraction of seconds, every single time we breathe in and out!

Now that you understand the importance of oxygen in our body, can you imagine organisms that can survive and reproduce without oxygen? Sounds impossible, doesn’t it? But the truth is that there are many tiny organisms that have proved their strange and fascinating ways of surviving without oxygen!

Which organisms can survive without oxygen?

Any organism that can live without oxygen is called an anaerobic organism or anaerobe. Yeast is an example of an organism that can live without oxygen. There are also anaerobic bacteria that require no oxygen for respiration.

Recently, scientists discovered a life-form in a certain parasite that falls under the same category. Calling their discovery an accident, this team of scientists led by Dayana Yahalomi at the Tel Aviv University in Israel discovered a small, parasitic cnidarian — a relative of a jellyfish that parasites in salmon fish. This parasite apparently requires no oxygen to respire or grow. Called Henneguya salminicolathey are tiny alien-headed parasites with a long tail that feeds on the muscle tissue of salmon and other fish