The Respiratory System

1
The Respiratory System

• Topics
• Respiration?
• Parts of the respiratory system
• Breathing

2
What is Respiration?

• Respiration is
• Process where Oxygen (O2) is exchanged for Carbon
  Dioxide (CO2)
• Consists of
• Nose, pharynx, larynx, trachea, bronchi,
  bronchioles, lungs, ALVEOLI

3
Parts of the Respiratory System

• Pharynx passage way to trachea(windpipe)
  esophagus
• Epiglottis door that opens/closes treachea

Pharynx
Nose
Larynx
Trachea
Mouth
Lung
Bronchiole
Epiglottis
Bronchus
Alveoli
Bronchioles
Diaphragm
Capillaries
Edge of pleural membrane
4
Parts of the Respiratory System

• Larynx vocal cords at top of trachea
• Trachea AKA windpipe, tube that flows from
  larynx to bronchi

Pharynx
Larynx
Nose
Trachea
Mouth
Lung
Bronchiole
Bronchus
Epiglottis
Alveoli
Bronchioles
Diaphragm
Capillaries
Edge of pleural membrane
5
Parts of Respiratory System

• Bronchi passageways into lungs moving into
  bronchioles

Pharynx
Larynx
Nose
Trachea
Mouth
Bronchiole
Lung
Bronchus
Epiglottis
Alveoli
Bronchioles
Diaphragm
Capillaries
Edge of pleural membrane
6
Parts of the Respiratory System

• Alveoli final air sacs w/ capillaries that
  exchange O2 CO2 (350 million)
• FUNCTIONAL UNIT of resp. sys.

Pharynx
Larynx
Nose
Trachea
Mouth
Lung
Bronchiole
Bronchus
Epiglottis
Alveoli
Bronchioles
Diaphragm
Capillaries
Edge of pleural membrane
7
Gas Exchange

• In alveoli, O2 diffuses across capillaries and
  CO2 diffuses out
• Inhale
• 21 O2
• 0.04 CO2
• Exhale
• 15 O2
• 4 CO2

Alveoli
Bronchiole
Capillary
8
How do we Breath?

• Diaphragm muscle that pulls down expand lungs

Air exhaled
Air inhaled
Rib cage descends
Rib cage rises
Diaphragm
Diaphragm
Inhalation
Exhalation
9
How is breathing controlled?

• Medulla Oblongata (part of brain)
• controls breathing by detecting CO2 no O2.
• If High in CO2, you breath faster