Organization of the Body: Serous Membrane Locations
1. Introduction to Anatomy & Physiology
Organization of the Body: Serous Membrane Locations - Video Tutorials & Practice Problems
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Locations of Serous Membranes
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3m
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We've been talking about serous membranes and cerus cavities in general. And we've been using the heart as an example when we do that. But of course, the heart is not the only organ that moves inside of your body. When you breathe your lungs expand and contract as food moves through the digestive tract, those organs change shape as you move your body, the organs inside you need to move with you. So most of those organs are gonna be surrounded by cerus membranes and cerus cavities. Much like the heart is, we're now gonna name the specific cerus membranes of the body and say where they're located. So we're gonna start by just noting that there are four serous membranes and they are located in the thoracic and abdominal pelvic cavities. The first two are gonna be the luri, the pleura form the plural cavities and these surround each lung. Now, remember the lung is not in the cavity, the cavity surrounds the lung. We can take a look at our anatomical model over here and we see a, a model from a sagital view and we can see the anterior body cavity and here in blue and taking up most of the thoracic cavity. Here, we see pretty much the shape of a lung and it's labeled pleura. One pleura surrounds one lung. Now, you may notice that the pleura here ends in a single A and over here it's ple where it ends in A E. These are these kind of weird Latin endings where a single A means a singular one. Pleura surrounds one lung and A E ple is multiple. There's two ple that surround the lungs that sometimes gets me a little confused, but I can use it to help me remember that the pleur and plural cavities refer to the lungs. And that's because plural cavities is plural. There's more than one lung, there's more than one plural cavity. Now, those two words, plural and plural, they come from completely different roots. But for this purposes, it doesn't matter. Plural means more than one. You have more than one lung. OK. Pericardium is next. And the pericardium forms the pericardial cavity. This is the membrane in the cavity that surrounds the heart. And again, as we look over at our anatomical model here, we can see the shape of a heart in green at the anterior portion of the thoracic cavity here and it's labeled pericardium as that's the membrane surrounding the heart. Now, to remember this cardiac means heart and peri means around. So when you put those together pericardium, it literally means around the heart. And this is the membrane and the cavity that surrounds the heart, our final membrane and cavity. While the membrane is the peritoneum, and that's gonna form the peritoneal cavity, this is gonna surround most digestive organs. And again, as we look over at our anatomical model, we can see the peritoneum here in this sort of yellow or orange color. And it's taking up most of the abdominal cavity and it even enters down into the pelvic cavity. Some. And that's because remember there is no hard dividing line between the pelvic cavity and the abdominal cavity. And it's gonna be labeled peritoneum. So the peritoneum is gonna be a little bit different than these other cavities because these other cavities all surrounded one organ. The peritoneum is surrounding most digestive organs use several like digestive organs and some of them are kind of crazy shapes, right. Your intestines are over 20 ft long and all of that intestine is gonna be touching peritoneum and not other organs. So the shape of this membrane and the shape of this cavity is gonna be really complex. It's gonna be really big and much more complex than the other membranes. And you can remember that a little bit because peritoneum literally means stretched around, it's gonna be stretched around a whole bunch of different organs. We're gonna go into that in a little bit more detail in a future video for now. What you need to remember is that there's two pleura, they surround the lungs the pericardium surrounds the heart and the peritoneum is the membrane that surrounds most digestive organs and some of the organs in the superior region of the pelvic cavity. With that, I'll see you in the next video.
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Organization of the Body: Serous Membrane Locations Example 1
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2m
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This example asks us to match each layer of the serous membrane with an organ or structure it touches. So let's see what we gotta match. We have the visceral pericardium, the parietal pleura, the visceral peritoneum and the parietal peritoneum. All right, before I get going here, I just wanna note that for me, all those p words start getting jumbled in my head, right? We have pericardium, parietal peritoneum. So let's just take it step by step and break down each word one by one. So first off, we have a the visceral pericardium. So visceral, remember viscera refers to the organ. So this is the organ side of the membrane and pericardium. Well, we said peri means around and cardiac is heart. So it's around the heart, around the heart on the organ side of the heart. So it's gonna be touching the heart. Oh There it is a the first option. Heart. Next up we have parietal pleura. Now remember parietal parietal was Latin meaning wall. So it's gonna be touching the body wall in pleura, right? I remember like pleura and plural cavities. That's plural. There's more than one pleura because there's two lungs. So touching the body wall around the lungs is gonna be touching the walls of the thoracic cavity or the chest. So there we have it b down here the wall of the chest. Next up, we have the visceral peritoneum, visceral. Remember visceral again is the viscera that's gonna be the organ side of the membrane and peritoneum peritoneum, we said stretched around and it's stretched around all these different digestive organs. So the visceral peritoneum is gonna be touching the organs in the abdomen. Oh, we have an organ of the abdomen over here in the liver. So I feel confident that the visceral peritoneum is gonna be touching the liver. Then finally, we have the parietal peritoneum. Now we only have one more place but let's break it down. Anyways, parietal meant wall and peritoneum was the membrane that's in the abdominal and a little bit into the pelvic cavities. So if it's touching the body wall and the abdominal cavity, it's gonna be touching the wall of the abdomen. There it is d while the A OK. Again, those words can be a little confusing. Take them step by step, break them down in your head and you'll do fine. See you in the next video.
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Problem
Problem
Which body cavity has multiple serous cavities within it?
A
Thoracic
B
Abdominopelvic
C
Pleural
D
Every body cavity contains one serous cavity.
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