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Mammalian Lungs

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					                  Lung Tissue
• List the features of the mammalian lung that
  adapt it to efficient gaseous exchange
• Describe, with the aid of diagrams and
  photographs, the distribution of cartilage, ciliated
  epithelium, goblet cells, smooth muscle and
  elastic fibres in the trachea, bronchi, bronchioles
  and alveoli of the mammalian gaseous exchange
  system;
• Explain the functions of cartilage, cilia, goblet
  cells, smooth muscle and elastic fibres in the
  mammalian gaseous exchange system;
                  Lung Tissue
• List the features of the mammalian lung that
  adapt it to efficient gaseous exchange
• Describe, with the aid of diagrams and
  photographs, the distribution of cartilage, ciliated
  epithelium, goblet cells, smooth muscle and
  elastic fibres in the trachea, bronchi, bronchioles
  and alveoli of the mammalian gaseous exchange
  system;
• Explain the functions of cartilage, cilia, goblet
  cells, smooth muscle and elastic fibres in the
  mammalian gaseous exchange system;
                          Task
• Using textbooks and the internet, produce a piece of
  work of your choice which meets the following success
  criteria:
• It must describe with the aid of diagrams and
  photographs, the distribution of cartilage, ciliated
  epithelium, goblet cells, smooth muscle and elastic
  fibres in the trachea, bronchi, bronchioles and alveoli
  of the mammalian gaseous exchange system;
• It must also have annotations (labels) which explain the
  functions of cartilage, cilia, goblet cells, smooth muscle
  and elastic fibres in the mammalian gaseous exchange
  system;
   Cartilage

Ciliated epithelium
      Smooth Muscle

 Longitudinal Muscle

     Elastic Tissue

Goblet Cells
http://umanitoba.ca/faculties/medicine/units/anatomy/hahbhistrespiratory.html
http://medicalarticle-mscmsu.blogspot.com/2008_07_01_archive.html
http://download.videohelp.com/vitualis/med/his_pic_respsys2.htm

Elastic fibres: aid in the expansion, contraction and stability of trachea walls

Smooth Muscle: smooth muscle contracts to constrict the airway, reducing the flow of air
to and from the alveoli e.g. an allergic reaction like asthma

Ciliated Epithelium: contain numerous tiny, hair like structures projecting from the
membrane called cilia. They waft mucus up the airway to the back of the throat- the
mucus is then swallowed into the stomach where the acid kills any bacteria trapped
within

Cartilage: Plays a structural role. It supports the trachea and bronchi, holding them open.
This prevents collapse when the air pressure is low during inhalation. It does not form a
complete ring so there is some flexibility for moving your neck etc.

Goblet Cells: Secrete mucus to trap tiny particles e.g. pollen or bacteria. This reduces the
risk of infection.
                                      Task
• Using textbooks and the internet, produce a piece of
  work of your choice which meets the following success
  criteria:
• It must describe with the aid of diagrams and
  photographs, the distribution of cartilage, ciliated
  epithelium, goblet cells, smooth muscle and elastic
  fibres in the trachea, bronchi, bronchioles and alveoli
  of the mammalian gaseous exchange system;
• It must also have annotations (labels) which explain the
  functions of cartilage, cilia, goblet cells, smooth muscle
  and elastic fibres in the mammalian gaseous exchange
  system;

You should email your completed task- you have 1 double lesson to complete this plus
time at home.
                  Lung Tissue
• List the features of the mammalian lung that
  adapt it to efficient gaseous exchange
• Describe, with the aid of diagrams and
  photographs, the distribution of cartilage, ciliated
  epithelium, goblet cells, smooth muscle and
  elastic fibres in the trachea, bronchi, bronchioles
  and alveoli of the mammalian gaseous exchange
  system;
• Explain the functions of cartilage, cilia, goblet
  cells, smooth muscle and elastic fibres in the
  mammalian gaseous exchange system;
                  Lung Tissue
• List the features of the mammalian lung that
  adapt it to efficient gaseous exchange
• Describe, with the aid of diagrams and
  photographs, the distribution of cartilage, ciliated
  epithelium, goblet cells, smooth muscle and
  elastic fibres in the trachea, bronchi, bronchioles
  and alveoli of the mammalian gaseous exchange
  system;
• Explain the functions of cartilage, cilia, goblet
  cells, smooth muscle and elastic fibres in the
  mammalian gaseous exchange system;

				
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posted:5/3/2011
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