Lung Tissue

1. 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;

2. 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;

3. 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;

4. Trachea Cartilage Ciliated epithelium Smooth Muscle Longitudinal Muscle Elastic Tissue Goblet Cells

5. http://umanitoba.ca/faculties/medicine/units/anatomy/hahbhistrespiratory.htmlhttp://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.

6. 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.

7. 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;

8. 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;