1 All Physician Training licenses expire on August 31, 2015, are good for three years, and can only renew once (for a total of six years). 2  All Physician Assistant licenses expire on January 31 of even-numbered years.  All Anesthesiologist Assistant licenses expire on January 31 of even-numbered years.
The epidermis is the uppermost or epithelial layer of the skin. It acts as a physical barrier, preventing loss of water from the body, and preventing entry of substances and organisms into the body. Its thickness varies according to body site. The epidermis consists of stratified squamous epithelium.
Epithelial Cells in Urine. The epithelia cells are simply cells that are gotten from the epithelium, which is the lining found in and outside the body. These cells are produced often, and old cells shed away to give room for the new cells.Different parts of the human body have distinctive epithelial cells. In older women, immature and small epithelial cells from the vagina (parabasal squamous epithelial cells) can be present in urine samples. 2  This is common in post menopause women with low estrogen levels.  3 Also, transitional cells found in urine are quite uncommon and mostly found in elderly people.