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Flowchart of Respiratory System

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					Respiratory System


        Your Lungs
Function of the respiratory system:

   To exchange oxygen and carbon dioxide
2 Definitions of Respiration

1.   (Cellular Level)   2.   Process by
     The release of          which oxygen
     energy from the         and carbon
     breakdown of            dioxide are
                             exchanged
     molecules in            between cells,
     food in the             blood, and air in
     presence of             the lungs
     oxygen
Nose

 Theroute in
 which air
 enters the
 respiratory
 system
Pharynx

A   passageway for both air and
  food
 Air moves from the pharynx
  into the trachea
Larynx

 Voice  box
 Contains highly elastic folds of
  tissue known as the vocal
  cords
Trachea

 Windpipe
 Cartilage called the epiglottis
  covers the entrance to the
  trachea when you swallow
 Lined with cilia
Bronchi

2  large passageways in the chest
  cavity
 Each leads to a lung
 Each divides into smaller bronchi
  until they reach tiny air sacs called
  the alveoli
Alveoli

 Grape-like  clusters
 Site where blood and air are
  side by side, site of gas
  exchange
 Delicate network of thin-walled
  capillaries surround the alveoli
Lungs

 Human lungs are
  located in two cavities
 the two are not
  identical
 Both are separated
  into lobes with three
  lobes on the right and
  two on the left
  Gas Exchange in the Lungs
  Section 37-3




                        Alveoli

Bronchiole




                 Capillary
Diaphragm

 Located   at bottom of lung
  cavity
 Large flat muscle
 Creates partial vacuum in the
  chest cavity
The Respiratory System
Section 37-3




                             Pharynx
  Nose                       Larynx
                             Trachea
  Mouth                      Lung                Bronchiole
Epiglottis                   Bronchus
                                                              Alveoli

                             Bronchioles




               Diaphragm
                                           Capillaries
               Edge of
               pleural membrane
                     Figure 37-16 The Mechanics of Breathing

      Section 37-3



 Air                              Air
 inhaled                          exhaled

                                 Rib cage
  Rib cage
                                 descends
  rises

                                 Diaphragm
Diaphragm




             Inhalation                      Exhalation
Emphysema

 Caused    by cigarette smoking
 Loss of elasticity in the tissues
  of the lungs
 People with this disease have
  difficulty breathing
  Bronchitis

 Common    in
  cigarette smokers
  and people who
  are around
  people who
  smoke
 Bacterial and viral
Lung Cancer

   Uncontrolled mitosis
   Can be caused by
    cigarette smoking
   Cells of cancer can
    easily spread to
    other part of the
    body…… WHY?
                        Flowchart
           Movement of Oxygen and Carbon
Section 37-3
        Dioxide In and Out of the Respiratory
                       System

Oxygen-rich
                        Nasal
  air from             cavities
                                                 Pharynx              Trachea                  Bronchi
environment



                                               Oxygen and
                                              carbon dioxide
  Bronchi             Bronchioles                                     Alveoli             Bronchioles
                                               exchange at
                                                  alveoli



                                                                                  Carbon
                                                            Nasal               dioxide-rich
            Trachea                 Pharynx                                      air to the
                                                           cavities
                                                                                environment
You are NOT cool!

   Stop smoking!!!

				
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