DNA replication is the process of producing two identical replicas from one original DNA molecule. This biological process occurs in all living organisms and is the basis for biological inheritance.
Ear Tubes. Recurring ear infections or fluid build-up in the middle ear may require the temporary placement of tubes in the ear. Ear tube surgery involves a very small incision in the eardrum, which is a thin layer of tissue separating the outer and middle ear. The procedure is known as a myringotomy or tympanostomy. A small, plastic tube shaped like a hollow spool (a tympanostomy tube) is then inserted into the eardrum to keep the middle ear drained and ventilated. The tubes remain for 6 months to several years, and eventually fall out or are removed by a doctor.
This holder often is a strap that fits around the head. Sometimes the breathing tube is placed through a surgically made hole called a tracheostomy (TRA-ke-OS-to-me). The hole goes through the front of your neck and into your windpipe. The tube put into the hole sometimes is called a trach tube. The procedure to make a tracheostomy usually is done in an operating room. Anesthesia is used, so you won't be awake or feel any pain.