In the respiratory system certain structures allow air to pass from the trachea to the lungs. they are lined with thin muscles and coated with epithelial cells. these structures are called
a. bronchial tubes.
b. alveoli
c. bronchioles
d. lobules.

Which characteristic do healthy families have in common? a. having above average household income b. ignoring one another’s happiness c. demonstrating love for oneself d. communicating with one another

Cardiac output is affected by heart rate exercise stroke volume all of the above

Jamie is trying to become more active likes to run and lift weights but he feels the need to do more to get hidden burned up in work his heart doesn't have access to gym but has weights in living community with sidewalks can you come up with three different workouts for him that will him get into his target heart rate zone