Osteons are arranged in parallel to the long axis of the bone. The Haversian canals surround blood vessels and nerve cells throughout the bone and communicate withosteocytes in lacunae (spaces within the dense bone matrix that contain the living bone cells) through canaliculi.
Any donation to a political party, campaign, or action committee is not tax deductible. 1  According to the Internal Revenue Service, âYou cannot deduct contributions made to a political candidate, a campaign committee, or a newsletter fund. 2  Limits On Contributions To Political Campaigns.
Charitable contributions are tax deductible in most cases. When a person donates a charitable good and gets a receipt, he can easily write the donation off on his taxes. Volunteer work of any sort, even senior volunteer work, may not be tax deducible. Community service occupies a gray area in the tax code.