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.
The eustachian tubes are tiny tubes that run between the back of the throat and the middle ear (the part of the ear behind the ear drum). The function of the eustachian tubes is to drain fluid from the middle ear into the throat and also to equalize the pressure behind the ear drum. Sometimes, the eustachian tubes become inflamed and do not function properly. The most common cause of eustachian tube dysfunction is a viral infection like the common cold.