1. Respiratory system

2. Outcome • Students will be able to recognize the different parts of respiratory system. • Students will be able to determine functions of different parts of respiratory system.

3. It is composed of: • Nasal cavity • Pharynx • Larynx • Trachea and bronchi • Lungs

4. Nasal cavity • It is bounded by: • Roof: formed of frontal bone and sphenoid bone • Floor: formed by hard palate • Medial wall: formed by nasal septum • Lateral wall: formed by the maxilla and palatine bone

5. Pharynx • It is a common pathway for the food and the air

6. Larynx • It extends from the root of the tongue to the cricoids cartilage • It is formed of : • Cartilages • Muscles • Membranes'

7. Trachea • It is a vertical tube. • It has cartilaginous rings to keep it patent. It connects the larynx to the lungs. • It divides into two bronchi (right & left). • Each bronchus enters the corresponding lung

8. Bronchi

9. Lung • There are two in number (right & left). They are conical in shape. It has an apex, base, medial & lateral surfaces. • Difference between the right and left lungs:

11. 1 1 4 4 Upper lobe Upper lobe 3 2 2 Middle lobe 5 Lower lobe Lower lobe 6 Left lung Right lung . 1. Apex. 2. Oblique fissure. 3. Transverse fissure. 4. Anterior border. 5. Cardiac notch. 6.Lingula.

12. Possible questions: • By using a table, mention the deference between the right & left lung. • By using a table, mention the deference between the right & left bronchus.

13. Assignment: • The students are requested to prepare a poster demonstrates the respiratory system • احمد محمد احمد عبد العال عبد الحميد • احمد محمد فوزي عبد العظيم عبد النبي • اخلاص حمدي محمد خليل • اسراء علي محمود علي فرحات

14. Refrences • Gray's Anatomy for student (2004 recent ed) • Snell's Clinical anatomy (7thed) • Last's Anatomy, Regional and applied (10thed)

15. Thank you