Joints can be separated into two classes: functional and structural. Joints are divided into three different functional classes. They are synarthroses, amphiarthroses, and diarthroses. Synarthroses means the joint is immovable, amphiarthroses means the joint is slightly moveable, and diarthroses means the joint is freely moveable.
minimum recommended protection lightweight and easy to use requires no maintenance osha cdc epa and nyc doh mh recommend using a n95 disposable respirator as minimum protection from mold and dust
RESPIRATOR CLASSIFICATION I. APPROVED RESPIRATORS. A. The Occupational Safety and Health Administration (OSHA) respirator standard (reference 1) requires using NIOSH (National Institute for Occupational Safety and Health) approved respirators to protect workers against inhalation hazards. On 8 June 1995, NIOSH updated the respirator certification procedures and reissued them under 42