Since 1930, the average lifespan of someone in the united states has increased
7 years.
12 years.
19 years.
22 years.
26 years.

Maintaining a healthy weight allows the respiratory system to work more effectively because a. oxygen is being delivered more adequately. b. the heart does not have to pump as forcefully. c. the capillaries are constricted. d. the lung capacity allows for small amounts of air.

Ronald is concerned about exposure to antibiotics and hormones in our food supply. which type of wellness does this affect?

What is the function of the retina?