What organs have stratified squamous epithelium?
Table of epithelia of human organs
|digestive||oesophagus||Stratified squamous, non-keratinized|
|digestive||stomach||Simple columnar, non-ciliated|
|digestive||small intestine||Simple columnar, non-ciliated|
|digestive||large intestine||Simple columnar, non-ciliated|
Stratified squamous epithelium is a type of tissue found covering and lining parts of the body. In this tissue, cells are flattened, joined tightly together, and stacked. The major function of this tissue type is protection, as it is found in areas that undergo wear-and-tear.
- Simple squamous epithelia are found in capillaries, alveoli, glomeruli, outer layer of skin and other tissues where rapid diffusion is required. Cells are flat with flattened and oblong nuclei. It is also called pavement epithelium due to its tile-like appearance.
- The cells are joined together at specialized regions called cell junctions. An important point to remember is that epithelia do not contain blood vessels. Nutrients and oxygen reach epithelial membranes by diffusing from blood vessels located in the connective tissue beneath the basement membrane.
- Stratified cuboidal epithelium is a type of epithelial tissue composed of multiple layers of cube-shaped cells. Only the most superficial layer is made up of cuboidal cells, and the other layers can be cells of other types.
Simple squamous epithelia are found in capillaries, alveoli, glomeruli, outer layer of skin and other tissues where rapid diffusion is required. Cells are flat with flattened and oblong nuclei. It is also called pavement epithelium due to its tile-like appearance.
- This type of epithelium is often permeable and occurs where small molecules need to pass quickly through membranes via filtration or diffusion. Simple squamous epithelia are found in capillaries, alveoli, glomeruli, outer layer of skin and other tissues where rapid diffusion is required.
- They are called transitional cells, renal tubular cells, and squamous cells. If there are squamous epithelial cells in your urine, it may mean your sample was contaminated. This means that the sample contains cells from the urethra (in men) or the vaginal opening (in women).
- A squamous intraepithelial lesion (SIL) is an abnormal growth of epithelial cells on the surface of the cervix, commonly called squamous cells. This condition can lead to cervical cancer, but can be diagnosed using a Pap smear or a colposcopy.
A stratified squamous epithelium consists of squamous (flattened) epithelial cells arranged in layers upon a basal membrane. Only one layer is in contact with the basement membrane; the other layers adhere to one another to maintain structural integrity.
- In keratinized stratified squamous epithelium the outermost layer is composed of tightly packed dead cells filled with the protein keratin. Keratin is the same protein which makes up hair and fingernails. The layer of keratin-filled cells acts as water-proofing.
- stratified (definition) more than one layer of cells. pseudo-stratified (definition) tissue appears to be stratified, but all cells contact basement membrane so it is, in fact, simple. squamous (definition)
- Simple cuboidal epithelium is found in organs that are specialized for secretion, such as salivary glands and thyroid follicles, and those that are specialized for diffusion, such as the kidney tubules. As its name implies, this tissue consists of a single layer of cuboidal cells on the basement membrane.
Updated: 21st November 2019