3. Discuss the path oxygen takes from the air to your respiratory system, down to how the oxygen is transmitted to the circulatory system. Without the
respiratory system, why would the circulatory system be nearly useless?
Similarly if your respiratory system was no longer able to effectively remove
carbon dioxide from your blood, what chemical change would occur
throughout the body?

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.

Lordosis can often be prevented by strengthening core muscles in the abdominals and back. a. true b. false

Astairway has 6 steps. is it a handrail required? a. a handrail is required b. a handrail is not required c. double handrails are required d. only nosing is required