Respiratory System

1
Respiratory System

• In Class Notes

2
Function

• The function of the circulatory system is to
  transport nutrients, oxygen, and hormones
  throughout the body
• Also, the circulatory system carries waste away
  from the body.

3
Organs Involved

• Nose/Mouth- air enters respiratory system
• Pharynx- chamber in upper throat where air passes
• Epiglottis- flap of tissue that momentarily
  covers the air pathway and prevents water or food
  from entering
• Larynx- voice box and air pathway
• Trachea- air pathway AKA windpipe
• Bronchi- connects trachea to lungs
• Lungs- exchanges oxygen and CO2 with the blood
• Bronchioles- thin tubes that branches from the
  bronchus within the lungs
• Alveoli- tiny air sac
• Diaphragm- a sheet of muscle that plays a key
  role in breathing

4
Sequence of breathing

• INHALING
• Diaphragm and ribs contract
• Fill up lungs with air
• EXHALING
• -diaphragm and ribs relax
• -air rushes from lungs out of nose or mouth

5
Diagram
6
Parts you should know
                                                                                                                                  
7
How is breathing regulated?

• Breathing is regulated by the medulla in the
  brain.
• The medulla increases the breathing rate when the
  CO2 level is too high.
• When the body is a rest or does not require high
  levels of oxygen the rate of breathing slows.

8
What effects does smoking have on the respiratory
system?

• Smoking exposes the respiratory system to many
  harmful substances.
• These substances can
• Destroy cilia
• Increase risk of lung cancer
• Increase risk for other respiratory diseases

9
Name at least 3 disorders provide a description

• Asthma disease affecting the airways that carry
  air to and from lungs
• Aortic aneurysms weakened bulging areas in the
  aorta
• Stroke if a clot forms in an artery leading to
  the brain a stroke can occur