Because arthropods are characterized by bilaterally symmetric  segmented bodies, an exoskeleton made from chitin, and joint  appendages, pretty much any characteristic otherâ¦ than these might  disqualify the organism. Mammals for example, with their internal  skeleton would be disqualified.
Medical Expense Deduction. You can deduct medical mileage as part of your overall medical expense deduction. The IRS limits the medical deduction to the amount of medical expenses in excess of 7.5 percent of your Adjusted Gross Income.
How Much Can You Deduct? The amount of medical expenses that is deductible is anything over 7.5 percent (rising to 10 percent in 2013) of your adjusted gross income. If you met with your therapist every week and paid $75 per session, the deduction amount is $75 times 52 weeks in a year or $3,900.ow Much Can You Deduct? The amount of medical expenses that is deductible is anything over 7.5 percent (rising to 10 percent in 2013) of your adjusted gross income. If you met with your therapist every week and paid $75 per session, the deduction amount is $75 times 52 weeks in a year or $3,900.