“Cayenne keyhole limpets are easily identified due to the keyhole-shaped orifice at the apex of the shell.”

“During excretion, the urethral orifice below the bladder is opened and the urine passes through the urethra.”

“The orifice connecting the right ventricle to the cavity was composed of dystrophic muscular fibers mixed with fatty cells.”

“Teeth are exempted from the requirement, as are incisions in or around natural body orifices.”

“The ureters, their resection margins, and internal orifices were free from tumor.”

“Other landmarks used to guide resection are the right and left ureteral orifices and the bladder neck.”