Which of the following are true of fibrous joints? Select all that apply. A) tightly bound by ligaments
B) flexible
C) stationary
D) only found in the knee

What is the main difference between trace elements and the main elements that make up the body? 1) main elements consist of heavier atoms. 2) trace elements are only needed in small amounts. 3) trace elements consist of heavier atoms. 4) main elements are only needed in small amounts.