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Hey!! Down here!!
How's it going? My name is Happy the Hamburger! I may not look like a hamburger to you, but to these people I'm a full course meal! Today, we're going to be travelling around in someone's digestive system... Fun right?? Let's go!!
This is my least favourite part.. Here we are in the mouth, where both chemical and mechanical digestion takes place. The chemical happens when salivary amylase is released through the salivary glands, breaking down my starch to simpler sugars. The mechanical happens with the teeth and the tongue mashing me up to form a bolus to make it easy to swallow me! Be right back, time to change shapes!!
Oh, and that big yellow arrow that gets in EVERYONE'S way is the epiglottis, its purpose is to make food go down the esophagus and NOT the trachea, that is the worst!
Ugh.. This really isn't a good look for me, I'm in my bolus form.. But here we are in the esophagus! This is where the wave like movements, or peristalsis push me down to the cardiac sphincter at the top of the stomach!
Here we are in the stomach! Just like the mouth, both mechanical and chemical digestion occur here! The mechanical digestion comes from the stomach churning me around so that I can travel through the small intestine easier! With the help of gastric juices, I deminish away to nothing! Sad, right? But don't worry, the person eating me has mucus to line its stomach so that the hydrochloric acid, also known as stomach acid, doesn't eat away at the stomach itself!
Oh, man! I'm headed toward the pyloric sphincter at the bottom of the stomach, so I'll have to talk quickly! While I'm in here, I'm being made into chyme, by the help of pepsinogen, the molecule that reacts with hydrochloric acid to make pepsin, which disolves my proteins to form polypeptides and amino acids through hydrolysis! Time to go, I'm changing shapes again!! Please continue to the next tab!
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