Systems function together to create a ___

Health and cardio respiratory fitness occurs when the heart is working, at minimum, 50 percent of heart rate reserve. true or false

Karen is waiting by the lockers before school for her friend richard. they had agreed to look over the history review sheet together to be ready for the test later that day. richard shows up late with uncombed hair and wrinkled clothes. karen: "you're five minutes late and you look like a wreck! " richard: (slams his locker) "you know, i don't have time for this." karen: "fine! figure out the test on your own! "

Which heath-related activity could be effectively completed using only internet resources? a. altering a prescription dosage b. getting support in surgery recovery c. diagnosing chronic back pain d. treating an eating disorder