Answer:
Osteons are cylindrical structures that contain a mineral matrix and living osteocytes connected by canaliculi, which transport blood. They are aligned parallel to the long axis of the bone. Each osteon consists of lamellae, which are layers of the compact matrix that surround a central canal called the Haversian canal.
Must contain enough water for 15 minutes of continuous rinse
There can be lots but some main ones are pesticides and disinfectantas hope this helps :)
