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.
When a child experiences multiple ear infections, ear tubes (also called tympanostomy tubes, ventilation tubes, or PE [pressure equalization] tubes) may be recommended by an otolaryngologist. These tiny tubes are inserted through the ear drum and perform a number of functions: 1  The tube prevents many ear infections by allowing air in the middle ear to exchange freely with the outside air, preventing the formation of a vacuum in the middle ear. This tends to keep infection from coming to the ear from the back of the nose and causing the ear infection.