Do you remember your high school biology class when you learned about the structure of the animal cell? Do you recall the sausage-looking organelles in the cytoplasm called the mitochondria (singular mitochondrion)? They are responsible for the conversion of food to usable energy in the form of ATP. The mitochondria are called the “powerhouses of the cell”.
(Can you tell I was once a high school science teacher? I worked for several years after college as a high school science, math, and French teacher in Toronto Canada before moving to New York City for my graduate studies. I loved taking what were very boring subjects and transforming them into fascinating classes for my students. Taking complex material and making it easy to understand is actually what I try my best to do at Hypothyroid Mom. My hope is that I make the science of thyroid disease easy for everyone to understand.)
I bet you had no idea that your high school biology class would actually become something very useful to you! It could explain why you are so darn tired all the time.