A Journey Inside Your Body

Hey guys! Wanna go on an epic journey…through the human body? C’mon, don’t be scared, it’s perfectly safe! We’re gonna start with the mouth because it’s the gateway to the digestive system. That system is designed specifically to transform food into useful nutrients that keep you energized and help your cells grow and repair.

By the way, did you know that the amount of saliva you produce in a year could fill 2 medium-sized bathtubs! Almost a pool full of drool! Yuck! But saliva comes in handy as it mixes with food and breaks it down even more. That way, your stomach doesn’t have to digest whole chunks of food. Interested? Then let’s do it! You’re gonna learn a lot about yourself!

  • So, once you grab the first bite of whatever you’re eating, you turn on the digestion machine. As you chew, food is broken up into pieces to make the process easier.
  • The muscles in the walls of this guy’s esophagus are squeezing behind me and relaxing in front of me. This is a process called peristalsis, and it’s what moves me through your digestive system.
  • The stomach holds, mixes, and grinds the food up into mush, so it has to be pretty strong.
  • The small intestine is made up of 3 sections. Bile is crucial to digest fat and take all the waste out of your blood, so be thankful your liver produces it.
  • And that thing over there that looks like a pear – that’s the gallbladder. It’s located under the liver and keeps bile in it until the right moment comes.
  • Also known as the colon, it’s a muscular tube that’s 5 to 6 feet long.
  • Your intestines need good bacteria to help them break down food, vitamins, and nutrients so that your body can use them.
  • Still loads of bacteria all over the place. There can’t be too little or too many – otherwise you’d have digestive problems like food intolerances.
  • When the left colon gets too full of stool, it decides to dump it all into the rectum because it can’t hold it all by itself.
  • The rectum is a straight chamber that’s about 8 inches long. It has special sensors, like this one or that one there, that let you know when there’s something you should get rid of.
  • If the moment is right for you (that is, you find a toilet), the sphincters relax, and ta-da! Your stool makes its exit.
  • Those rectum sensors help too so that the urge to release its contents disappears for a while.



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