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Esophagus histology at a glance

Course video 15 of 74

After the first introduction of the abdomen with all its organs, this week we will focus at some microscopy and the first stages of gut development in the embryo. The gut starts as a simple straight tube which differentiates further into a internalized tract with specialized sections, each with its own function. You will learn how the esophagus transports your food, while its lower sphincter prevents food from returning - even if you're upside down! Then you will focus on how the stomach drenches all food in an extremely acid pool, attacking ingested bacteria and starting the digestion. That same acid would also damage the duodenum, so protective action is required. You will follow the digestion further down the tract, with its extensive folds and specialized cells and end up with more and more solid bowel contents when water is extracted in the colon. In order to demonstrate some functions further, we also have to dive into the world of microscopy. Join us on this trip into the gut with all its ingenious structural specializations along the way!

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