uses video we're going to discuss the serous membranes so let's try to unpack this name serous membranes so serous means we are producing a watery fluid which is known as the serous fluid so serous means what did it boil a membrane means we have several types of tissues coming together to create a lining right so a membrane in the lining and this lining in fact is formed of some epithelial tissue we're going to call it mesothelium and then we might have some connective tissue layer as well so excuse membrane that by definition is the lining that produces a watery fluid and most serous membranes are found in certain body cavities so three body cavities but we are going to mention here pleural cavity pericardial cavity and peritoneal cavity so let's try to figure out what how membranes are related to the organs within those characters and then we are also going to talk about specific names for this serous membranes in different cabbages we're going to start with the example of the prior Pluto pathogen right so we know that the total cavity is going to call the lung so what we have here is the one we know and then we are also going to gain so each one has its own pleural cavity when they are separated from each other and for every serous membrane where should we distinguish two layers so we'll use some different colors to help us differentiate between the two so we have a way of the serous membranes but is going to wine and cover the surface or were done with Bianca cavity so because we're talking about pleural cavity in this particular case we have a layer of the serous membrane right on the surface of one right so it covers the lines of protective alocs this layer of the serous membrane that's located one but furthest overworking gets the name Israel and one way to remember that the visceral layer covers boredom is the fact that the word this reveals internal work right so viscera means internal working so additional layer of a serous membrane is going to cover the surface of the work and within each character right so but then we know that videos the cavity surrounding the lungs and we also have a lining who might in the wall get the word right so all serous membranes are going to have two layers a visceral layer that will be found on the surface of a worgen covering Gordon and the parietal layer which is going to line four walls I'm going to notice that between these two layers we have a space now in this particular diagram we put and we drew a lot of space but then the boy gets mostly potential space so the place where we can potentially collect different types of fluids or air but it's not quite as large as we're showing it on the diagram but we're doing it so we can help us identify these differences between the two layers so the space between the two layers is going to be what you now remember we said that the serous membranes produces a watery fluid and you paint it with the cavity but we are going to have it we're gonna call it a pleural fluid okay cardio who else would write for right now we're just gonna generically label it as fluid and this fluid is very important because the text is a lubricant we know about whether it is one of the most important the lubricant service water in fluid serves as a lubricant and badly doose's friction this what happens when we have an inflammatory process within those two membranes we're actually producing a fluid that is more dance we're going to call it an accident and as a result of that there is way more fiction happening to clean this two layers and we're poised is a lot of pain so if we have a condition known as pleuritis this pain is going to be in the pleural cavity it's thicker digest is going to be in vain they occur do care again if it's pure tonight this is going to be in the peritoneal cavity right so generically we said all serous membranes have to where's visceral and parietal were going to have a cavity between the two layers and the cavity will be killed with a little bit of fluid to serve as a lubricant so now what's named individual serous membranes in each of those cavities so in the pleural cavity the serous membrane is known as the pleura which means in this particular example this is the parietal pleura right because it finds the walls and this is the visceral pleura because the surface of the lungs in the pericardial cavity this membrane is called K cardia caracarno membrane so again if we hear visceral pericardium that means it's a part of a Cargill membrane on the surface of a heart and if we hear Breithaupt Ricardian we know that it is going to lie on the cavity and when finally the continual parody is going to help to create a new membrane okay Taniya so Gabi you could think Katie the name of the kid Neil membrane and we're going to have this relay which is going to cover some organs completely in built on the pelvic area and then we're going to have a bright aware which will be fine the walls over the cavity so just to summarize we know that Heelys membranes are going to have two layers we talked about varietal and visceral we also named specific serous membranes within each of those cavities and we said that between the two layers whether it's the pleura the pericardium over there - Nia would have a little bit of fluid acting to reduce friction and help us with a functioning overworked