What can be avoided when living in a safe environment? A. accidents C. injuries
B. harm and danger
D. all of the above

What are hormones? a. they are minerals needed for proper bone formation. b. they are the parts of the body targeted by endocrine glands. c. they are substances needed for muscle and nerve activity. d. they are substances released by endocrine glands.

Describe the concept of interval training. what is the benefit of this type of training?

Which of the following is not considered a lymph node function? to house immune cells to transport lymph to filter blood to fight infection