What is the correct name of the following epithelia?

Question

BlackTom AI · Accepted Answer

The question asks for the correct name of the epithelia shown in the image. At first glance, there are multiple cell layers stacked on top of each other, indicating a stratified arrangement rather than a simple (single-layer) epithelium. The surface cells appear flattened (more polygonal to squamous in shape), which is characteristic of stratified squamous epithelium.

Option analysis:
- If the intended choice were stratified cuboidal epithelium, that would imply a relatively small number of cell layers (typically 2–3) with cube-shaped cells in each layer, usually lining certain ducts. However, the image shows many layers with cells that are not distinctly cuboidal in appearance, and the surface cells are flattened rather than cube-like. This makes stratified cuboidal unlikely for this specimen.
- Stratified squamous epithelium, on the other hand, involves multiple layers of cells with the surface layer being flat and scale-like. The basal layers are more cuboidal or polygonal, but as you move toward the surface, the cells flatten, which matches what is visible in the image.

Common misconceptions:
- Confusing transitional epithelia (urothelium) with stratified squamous: transitional epithelium shows cells that can appear cuboidal or pear-shaped and can change shape; the image shows consistently flat surface cells rather than a mix of cell shapes suitable for a flexible urinary tract lining.
- Assuming a simple, single-layer epithelium due to the appearance of the basal cells: the key feature here is the clear stratification with several cell layers, not a single layer.

In sum, the most consistent label for an epithelium with multiple layers and a flat surface layer is stratified squamous epithelium. The description and visual cues do not align with stratified cuboidal, which would present fewer layers and a more cuboidal surface cell morphology.

BIO 106-Human Anatomy and Physiology-001 Chapter 4 Quiz

What is the correct name of the following epithelia?

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