Which statement best describes the functioning of the cardiorespiratory system?
-the lungs pump oxygenated blood to the body and remove oxygenated blood from the heart.
-the lungs pump carbon dioxide into the blood and the heart circulates it throughout the body.
-the lungs import oxygen into the blood and remove carbon dioxide from the blood.
-the lungs import carbon dioxide into the blood and the heart circulates it throughout the body.
do not answer unless your 100%

During his workout yesterday, anthony pushed himself by lifting heavier weights. today he is feeling good, but his muscles are sore. what principle is at work in this situation? a. specificity b. progression c. overload d. reversibility

For years, tobacco products have included a message from the surgeon general warning the negative effects of tobacco use. at this time, a push is being made for the fda to begin to regulate e-cigarettes in order to mandate warning labels and age restrictions. write a paragraph that identifies 2 health problems that have been linked to nicotine and/or tobacco use. you should include statistics demonstrating the incidence of problems among smokers and provide a resource citing where you found the information provided. (remember from unit 1 what makes a resource reliable.) due in 2

Which is an example of a long term fitness goal?