1. Respiratory System Biology 322 Human Anatomy

2. V G GV G G Anatomical Structures Support Specific Functions of Respiratory System Ventilation: Movement of air to and from sites of gas exchange Gas Exchange: Movement of specific gases such as oxygen & carbon dioxide between air and blood (in lung) or between blood and extracellular fluids (in other tissues) Gas Transport: Movement of oxygen (in blood) away from lung and of carbon dioxide (also in blood) back toward lung.

3. Organs of Respiratory System

4. Lungs

6. Nasal Cavity: Removes dust & other debris Warms inhaled air Humidifies inhaled air

7. Right & left sides of nasal cavity separated by nasal septum; Nasal cavity separated from oral cavity by palate

9. Structure of Larynx: Nine cartilages: 3 large unpaired 3 smaller pairs You identifed these in lab

10. Vocal cordsVocal cords (also called or ) are strands of dense regular connective tissue running anteriorly from to. If they are adducted (close together) air moving between the cords causes them to vibrate.

11. Intrinsic muscles of larynx (no, you don’t need to know their names) move

12. Trachea: Begins at bottom of larynx (cricoid cartilage) Ends Cricoid Cartilage Primary Bronchus

13. Trachea: Held open Lumen lined by

14. Trachea: Cross section of neck at level of vertebra cervical 6

15. Lungs: Occupy most of thoracic cavity

16. Lungs: Primary bronchus, pulmonary artery, and pulmonary veins enter/leave lung together

17. Lungs: Surrounded

18. Lungs: Each lung divided into lobes by deep grooves or fissures

19. Lungs: Each lung divided into lobes by deep grooves or fissures

20. Lungs: Each lung divided into lobes by deep grooves or fissures

21. Lungs: Each lung divided into lobes by deep grooves or fissures

22. Lungs: Each lobe has

23. Lungs: Each lobe consists of

24. Trachea Primary bronchi Secondary bronchi Tertiary bronchi (smaller branches) (bronchioles) Terminal bronchioles Respiratory bronchioles Alveolar ducts Alveoli

25. Alveoli : Wall = Other cells:

26. As the bronchi branch and divide, At the end,

27. This air (in the alveolus) and blood (in the capillaries) are separated by a very thin wall, called