Today, we’re going to talk about the challenges we put our poor little stomachs through like how much food can these organs accommodate and once the food’s in there, what does the stomach do with it, also we need to talk about the deception that all children have given to us with their tummy aches for many many years, so we’ll address that as well as why does our stomach not eat itself alive with all the acid it produces that and more coming up. So let’s start with some of the stomach basics and the external anatomy of the stomach and how it sits in the human body, that is going to help us understand how the kids have been deceiving us for years so let’s take a look at the dissection, you will see the stomach down on the tray, it’s often referred to as this j shaped organ kind of like a j and you can see a curve and a curve there, the larger of the two curves is referred to as the greater curvature of the stomach, the smaller curve the lesser curvature of the stomach. The stomach can also be segmented into three regions which again will help us with location and future topics in this discussion. The first section is referred to as the fundus of the stomach, the central larger portion is referred to as the body of the stomach and the last portion, the pyloric region or the pylorus. Here now, there’s a really important sphincter in the pylorus region or the pyloric region and that’s right here called the pyloric sphincter, you can see that with the naked eye because the smooth muscle gets so robust there really strong sphincter that only allows a little bit of material to pass through at any given moment which we’ll talk about later but first we’ve got to talk about the location here, the stomach is located in the left upper quadrant of the abdomen, it would actually sit a little bit underneath the rib cage here, the left side of the rib cage and that would be about from here over the swooping of the stomach where the pyloric region or the pylorus would be more exposed outside of the rib cage, so this region right here so you have some of it under the rib cage, some of it’s swooping to the midline, if you take a look at the cadaver dissection, the stomach there now here are the ribs so you can kind of see on that left side that there’s the greater curvature of the stomach and it’s swooping towards the midline.
Now do you feel a little bit deceived by children, i mean how many of them ever come and say mommy, daddy, my tummy hurts, they’re never holding right here they’re always holding the wrong side and we fall for it, they’re lying to us, their stomach’s not hurting because it’s over here and all of us we feel bad for them so we let them stay home from school and when they go up into their room to rest whereas they were touching their small bowel. It’s good to know your anatomy and that’s the most important topic of all time agreed, all deception aside, it’s good to know the stomach, left upper quadrant, small intestine occupies more of the central abdomen. So let’s talk about the function of the stomach, once food gets down in there and also we’re going to talk about when we over stuff the stomach but let’s start with just regular old meals like regular sized meals, how the stomach will handle that, so if you go back to the dissection, what you can see is the very bottom of the esophagus, sometimes people nickname it the food tube, as we swallow the food goes down the esophagus down into the stomach, once it gets into the stomach we’re gonna have some of the cells stimulate the release of certain compounds or chemicals, now let’s see another dissection so just to compare this is about two-thirds of a stomach and it is a little bit larger in size especially the fundus, this is about where the esophagus would come into this stomach so you can definitely see the fundus is larger than the other stomach which again teaser, we’ll talk about stomach stretching in size later but one of the things that’s really awesome is if you look at the inside lining of the stomach, now this inside lining is referred to as the tunica mucosa, tunica just refers to a layer mucosa because it’s going to secrete some mucus, now these gastric folds are called gastric rugae, rugae just literally means folds, this will be important again later when we talk about stretching of the stomach.