[h3]Exercise[/h3]
Exercise has immediate effects on the [b]respiratory system[/b] and the [b]circulatory system[/b].
It increases:
[ul]
[li]breathing rate[/li]
[li]tidal volume (the volume of air breathed in or out in one breath)[/li]
[li]blood pressure[/li]
[li]beats per minute (the contractions of the heart, per minute)[/li]
[/ul]
[img src='https://res.cloudinary.com/deylrqt2d/image/upload/v1486841737/exercise_ihdfdp.jpg']
Aside from that they can also increase:
[ul]
[li]the strength of the diaphragm and intercostal muscles[/li]
[li]vital capacity (volume of air that can be forcibly exhaled after inhaling fully)[/li]
[/ul]
[h3]Drugs[/h3]
Drugs are classified in 2 distinct ways:
[ul]
[li]depressants[/li]
[li]stimulants[/li]
[/ul]
The [b]depressants[/b] lower the beats per minute, as they depress, or weaken, the body's life support system, and can be fatal.
The [b]stimulants[/b] increase the beats per minute, and they can lead to heart attacks, which can result in death.
[img src='https://res.cloudinary.com/deylrqt2d/image/upload/v1486841826/Drugs_ed_shutterstock_114920914L_k8zmrl.jpg']
