 So, our next chore is to look at some of the specific kinds of epithelial tissue. And we're going to consider six kinds of epithelial tissue. I'm going to write them on the board here just so you can see all six of them together. And then we'll talk about the individual ones. So we have what we call simple squamous epithelium. Simple cuboidal epithelium. Then we have simple columnar epithelium. And then we have one that sounds kind of complicated, but it's not. So it's called pseudo stratified columnar epithelium with cilia, pseudo stratified columnar epithelium with cilia. Then we have something called stratified squamous epithelium. And then finally we have one called transitional epithelium. All right. So six different kinds of epithelial tissues. And I wanted to write them up here so you could see them all together for a couple of reasons. And do you see that the first three are what we refer to as simple tissues. And just a second ago we said that a simple tissue is one that's only one cell layer thick. And so simple squamous, simple cuboidal, and simple columnar are all simple tissues. So that's easy enough. Then the next two have the word stratified in there. And earlier we said that a stratified tissue is one that has layers of cells. Now if you think about the term pseudo, you may remember talking about pseudopodia perhaps if you were looking at cells earlier, that term pseudo means faults. And so pseudo stratified columnar epithelium with cilia is actually a simple tissue but it appears layered. And we'll talk about why it appears layered in just a few minutes. Then the fifth tissue is stratified squamous and it does contain different layers of cells. And then the last one is transitional epithelium and it's found in the urinary bladder and the urethra. And it's a little different depending upon whether the bladder is full or the bladder is empty. So we'll look at that in just a few minutes also. Another thing that I'll point out that will help you remember these tissues is the other terms here. Squamous of course just means square. So when you think about a squamous cell, think about a square cell. Now cuboidal sounds like cube, same kind of thing, but instead of thinking about a square, think about a cube. Now when I'm doing this with seated classes I always ask students to think about what a cube is. About 15 years ago the answer when I said name a cube I would always get Rubik's cube. Now people say ice cube, but think or a dice, sometimes that's a popular answer. So think of something that is cube shape and that's like a simple cuboidal cell. Columnar has that word column in it. And so these cells have that column shape and that they're just as or they're taller than they are deep and wide. So they are column shape. Squamous again think about the square cells, but again they're layered and transitional is a little different. We'll look at that in just a second. So six epithelial tissues, simple squamous, simple cuboidal, simple columnar. And I remember those just because of the way they're shaped. I sort of picture them stepping up a little bit. So squamous, cuboidal, columnar, pseudo stratified, columnar, stratified and transitional. So the next thing we'll do is we'll look at some micrographs and talk about the characteristics of each of these different cells or tissues and what their cells may look like.