Why is a closed circulatory system under pressure? answer my question pls, I badly need it rn

Victoria enjoys laughing with her friends as they walk around the track after school which best describes her heart rate during this activity

Ingredients used in tobacco products been banned?

Does the weight loss program have practical significance? a. no, the program is not practically significant because the results are likely to occur even if the weight loss program has no effect. b. yes, the program is practically significant because the results are too unlikely to occur by chance. c. yes, the program is practically significant because the amount of lost weight is large enough to be considered practically significant. d. no, the program is not practically significant because the amount of weight lost is trivial.