What type of epithelial cells are predominantly found in the lining of the urethra?

The lining of the urethra is predominantly composed of transitional epithelial cells in specific sections, but it primarily features stratified squamous epithelial cells, especially in areas closer to the external opening. This type of epithelium is well-suited for protection, as it can withstand the passage of urine and potential trauma from external sources. The stratified arrangement of squamous cells provides a robust barrier that is effective in preventing the entry of pathogens and in accommodating the urethra's function as a conduit for urine expulsion.

While transitional cells are present in parts of the urethra, such as the area near the bladder, the predominant structure in the distal urethra is composed of stratified squamous epithelium, which gives way to the simpler columnar epithelium found in the bladder. Understanding the distribution of these cell types is crucial for recognizing how the urethra adapts to its various functions along its length.