Overview. The major passages and structures of the upper respiratory tract include the nose or nostrils, nasal cavity, mouth, throat (pharynx), and voice box (larynx). The respiratory system is lined with a mucous membrane that secretes mucus. The mucus traps smaller particles like pollen or smoke.
About more than 50 percent of optometrists received an annual salary ranging from between $70,140 and $125,460. According to the Bureau of Labor Statistics, the median hourly wage for an optometrist is around $51.42 per hour which averages to about $106,960 per annum.
(Canada). An Optometrist earns an average salary of C$87,781 per year. Most people with this job move on to other positions after 20 years in this field. A skill in Optometry is associated with high pay for this job. For the first five to ten years in this position, salary increases modestly, but any additional experience does not have a big effect on pay.