Distinguish between the osseous and membranous labyrinths.

Trace the path of sound waves from the external acoustic meatus to the hearing receptors.

Explain why pain may be referred, and provide an example.

What are the two major cavities of the body?

A partial work sheet of Plumbing Solutions for the month ended February 28 of the current year is given in the Working Papers. Also given is a blank form for completing an income statement. Work this problem independently. Prepare an income statement for the month ended February 28 of the current year. Calculate and record the ratios for total expenses and net income. Round percentage calculations to the nearest $0.1\%$.

Match the ear area with the associated structure: (1) outer ear (2) middle ear (3) inner ear A. cochlea B. tympanic membrane C. auditory ossicles