Capillaries connect the arteries to veins. The arteries deliver the oxygen-rich blood to the capillaries, where the actual exchange of oxygen and carbon dioxide occurs. The capillaries then deliver the waste-rich blood to the veins for transport back to the lungs and heart. Veins carry the blood back to the heart.
Reaction time is the time it takes for a sports performer to respond to a stimulus and initiate their response.
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Bronchodilator dilates the airway so that more air can get to the alveoli. In asthma, the inflammation causes the airway to become narrow, bronchodilators provide the opposite effect.
<span>Your target heart rate h</span>as a range of two numbers.
