What is the function of guard cells?

An 88 year-old widow with uterine prolapse and multiple comorbid conditions has been unsuccessful in the use of a pessary for treatment elects to receive colpocleisis (lefort type) to prevent further prolapse and avoid more significant surgery like hysterectomy. the treatment is successful. what are the cpt® and icd-10-cm codes reported for this procedure?

List five ways we are indebted to phytoplankton

What term describes a doctor who becomes a specialist by meeting standards beyond those of getting a license and passing a test in the specialty area?