Skeletal muscles are attached to the skeleton by tough connective tissues called tendons(see Figure above). Many skeletal muscles are attached to the ends of bones that meet at a joint. The muscles span the joint and connect the bones. When the muscles contract, they pull on the bones, causing them to move.
Answer:
Unwashd hands, Dirty enviroment.
False I think hope this helped
Answer:
I believe that it is prejudice.
The mucus that is produced is supposed to flush whatever is irritating the nose out.