Layers of the Abdominal Wall

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Okay, so this is a tutorial on the different layers of the abdominal wall, so, firstly, I’m just going to show you their various muscles very briefly and then we’ll run through the different layers that make up the abdominal wall. So right in the middle we’ve got this muscle here, which is called the rectus abdominis and and then on the side. Laterally we’ve got three different muscles, so superficially we’ve got this muscle with its fibers oriented in fur immediately. So this is the external oblique muscle I’ll just remove that underneath the external oblique we’ve got the internal oblique, and this has the majority of its fibers oriented sue power immediately and then underneath this we’ve got the transversus abdominus with its horizontally oriented fibers. So, let’s just um: let’s just take a look at a cross-section, so we’re going to slice the abdomen in half and we’re going to look at a cross-section and the different layers that we pass through.

So we’re looking at a cross-section now so I’ll, just orientate you so anterior is this side and you’ve got so. You can see the rectus abdominis muscles and then laterally. You can see the three muscles. I just showed you so: the external oblique, the internal oblique and the transversus abdominus. So we’ll just look at the we’re going to just imagine passing a needle through through the lateral side of the abdomen. So we’re going to take a look at the layers that a needle would pass through if we stuck it through this side of the person. So the first thing we’d pass through is obviously the skin. So we’ll just draw that on here and then next we pass through the superficial fascia. So the superficial fascia consists of two layers: you’ve got the superficial fatty layer, which is called campus fascia and you’ve got the deeper membranous layer which is called Scarpas fascia.

So the way I remember which way around these to go is that the letter see is before the letter S so campus is more superficial than scarf as fashio. So I’ll just draw that on here. So we’ve got just scribble that on so this is the superficial faster. This is the fatty campus fashio and we’ve got the the membranous layer, so so Scarpas fashio. So this is the superficial, fascia and that lies under the skin and then after this, the superficial fascia. It depends where you’re really putting the knife or needle or whatever, so, if we’re putting it through the lateral part of the abdomen so through here we’re next going to pass through the the muscles that I showed you so the external and internal obliques and the transversus Abdominus muscle, if we were shopping through here then we’ll pass through the upper neuroses of these muscles and obviously, if we put it through here, we’ll pass through the rectus sheath and the rectus abdominis muscle. So let’s just say we’re passing the knife through this part here. So we’ve gone through skin and then the superficial faster, which consists of the campers and Scarpas fashio, and now we’re going to go through these three muscles. So this is the external oblique, then the internal, oblique and then finally, the transversus abdominus.

So after the transversus abdominus there’s this thin low of fashio, which is called the transverse Alice fascia, and this lines the transversus abdominus and it also likes the abdominal cavity. So it wise lies right underneath the transversus abdominus and it runs just underneath and it lines the abdominal cavity. So I’m drawing this on in green. So this is the transverse Ollis fascia. So underneath the transversal is fasciae, we’ve got the extra peritoneal fascia. So I’ve draw this on in purple, so this is a thin layer of connective tissue, and this lies between the transversal is faster and the next layer, which is the parietal peritoneum. So that’s why it gets the name extra peritoneal fashion, because it lies outside the parietal peritoneum. So I’ve just draw the parietal peritoneum on here in red. So this is the final level fashio that your needle will pass through on life or whatever you’re, using so the parietal peritoneum lines, the walls of the abdomen and it’s a thin service membrane. So the peritoneum you’ve got the parietal peritoneum, which lines deep was with the abdomen, and you’ve got the visceral peritoneum, which covers the viscera and then you’ve got messin trees, which is kind of a doubling up the peritoneum to wrap around the organs and suspend it from The abdominal walls but I’ll do another tutorial on me on the peritoneal cavity in the peritoneum. So those are the layers of the abdominal wall, so you’ve got the skin the superficial, fascia consisting of campers and Scarpas fasciae, so fatty and member naysay, and then you’ve got the three muscles: the external and internal obliques and the transversus abdominus muscle and then you’ve got The transverse eyeless faster, which lies immediately below these muscles and then you’ve got the extra peritoneal fashio and then below that you’ve got the parietal peritoneum

As found on YouTube