I know a major key to happiness. guess what it is?
hint: it is not money, power, or youth

How is the structure of our circulatory system and respiratory system related to the function of both these systems?

What do you do if you fall over and bend your big toe all the way forwards?

Which of the following represents the results of a review of well-controlled studies of vitamin c supplementation on the resistance to, and recovery from, colds? there was a reduction in the duration of colds by 50% on the average. there was a slight effect on reducing the duration and severity of colds for people taking vitamin c supplements. there was a significant reduction in the duration of colds in people who consumed at least one gram a day. there was a significant reduction in the number of colds only in people who consumed > three grams per day.