ELI5: Explain Like I'm 5

Aerobic fermentation

Okay, so you know how when you run around or play really hard, you start to breathe faster and your heart beats faster too? That's because your body needs more energy to keep going. And how does your body get that energy? By using food!

Whenever you eat food, your body breaks it down into little pieces called molecules. One of those molecules is called glucose and it's like a tiny packet of energy. But in order for your body to use that energy, it needs to do something called "respiration".

Respiration is kind of like taking apart a Lego tower so you can use those Lego pieces for something else. When your body "respires" glucose, it breaks it down into even tinier pieces called ATP. ATP is the energy that your body uses to do everything from running and playing to breathing and thinking.

Now, there are two different ways your body can "respire" glucose - it can do it with oxygen or without oxygen. When your body uses oxygen to "respire" glucose, it's called "aerobic fermentation".

Think of it like baking a cake. When you bake a cake, you mix together a bunch of ingredients like flour and sugar and eggs. But in order for the cake to actually cook and turn into something delicious, you need to put it in the oven and let it bake. The oven is kind of like oxygen - it helps everything come together and work properly.

So when your body does "aerobic fermentation", it's like putting the cake in the oven. The oxygen helps your body break down the glucose and turn it into ATP so you have energy to keep playing and having fun!

And just like how you can't bake a cake without an oven, your body can't do "aerobic fermentation" without breathing in oxygen. So remember to take deep breaths and keep your body fueled with energy so you can have lots of fun and playtime!