Identify the six types of epithelial tissue shown in the drawi...

Question

Identify the six types of epithelial tissue shown in the drawing below.

d. ___

Illustration of six types of epithelial tissue cells labeled a to f, showing various shapes and arrangements.

Accepted Answer

Welcome back everyone. The surface of the skin and the lining of the mouth esophagus and anus are protected by which type of epithelium. A simple squamous epithelium. B, simple cuboidal epithelium, C stratified columnar epithelium or D stratified squamous epithelium. Let's start with choice. A simple squamous epithelium recall that simple squamous epithelium consists of just the basement membrane which acts as the supportive structure to the very small flattened square shaped squamous cells that make up the surface layer of strimple simple squamous epithelium. So, recall that this consists of just one layer of these flattened square shaped squamous cells at the surface of this epithelium. And so we would characterize simple squamous epithelium as being thin. So this type of epithelium because it is thin, is not going to provide adequate protection for the surface of the skin and lining of the mouth, esophagus and anus, which are going to need adequate protection from friction and wear of foreign particles and substances. For that reason, we will rule out choice. A then we have choice b simple cuboidal epithelium. Let's recall that simple cuboidal epithelium can be found within the kidney tubules. They can also be found in several types of glands, including the exocrine glands, such as the sal salivary glands and the pancreas. Simple cuboidal epithelium can also be found in thyroid glands and the surface of the ovaries. We'll also list simple cuboidal epithelium as being found within the lining of ducts in the body. The shape, the cube shape of these simple cuboidal epithelium allows for efficient secretion within these locations of the body. And for that reason, since we did not list the mouth esophagus, anus or skin, we're going to rule out choice B, then we have C stratified columnar epithelium recall that stratified columnar epithelium is considered a rare type of epithelium and is not going to be as widespread as the other types that we've covered. So far, we can find stratified columnar epithelia in the male urethra where recall that is a tube that carries urine from the bladder where the reproductive system is and out of the body. So, in certain parts of the lining of the male urethra, you can find stratified columnar epithelium. It is also found in the Paraty gland of the salivary ducts, which can have the presence of stratified columnar epithelium. And you can also find stratified columnar epithelia in the conject which recall is the transparent membrane covering the outer surfaces of the eye. So it lines the surface of the eyelids, sorry the inner surface of the eyelids specifically. And there is the potential of stratified columnar epithelium present in that location as well. Now, these locations do not align with the ones mentioned in our prompt, the mouth esophagus, anus, and skin. And for that reason, we're going to rule out choice c then we have the stratified squamous epithelium. Let's recall that stratified squamous epithelium consists of the most basal layer consisting of the basement membrane above this basement membrane. We can find column shaped epithelial cells known as columnar cells. Above these columnar cells is an intermediate layer which can contain multiple shapes of cells known as either cuboidal cells, which will have varying sizes and will be present in numerous layers. And above these layered cuboidal cells will be a layer of flattened squamous cells at the surface characterizing against squamous cells. So we can observe that stratified squamous epithelium contains multiple layers of cells and that would make it perfect for being adequate protection for the surface of the skin lining of the mouth esophagus and anus. This is going to be perfect for providing protection against physical and chemical stresses which can contribute to abrasion and potential damage from external substances to the mouth, esophagus, anus, and skin. For that reason, choice D is going to be the best answer as providing a thick layer of protection via stratified squamous epithelium to the skin, mouth esophagus and anus. This is our final answer. I hope that this made sense and let us know if you have any questions

Identify the six types of epithelial tissue shown in the drawing below.
d. ___

Key Concepts

Types of Epithelial Tissue

Simple vs. Stratified Epithelium

Specialized Features of Epithelial Cells

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