1. Monday December 2, 2013 Bell work What does this mean to you ? Some people dream of success while others wake every day and work hard for it

2. Monday – Notes on Respiratory System Tuesday – Notes on Respiratory System Wednesday – Worksheet Due * Go over and practice Thursday – Review for Test Friday – Test on Respiratory System

3. Special adaptations for exchange of gases (CO 2 & O 2 ) involved in aerobic respiration

4. Respiratory surface –Place where environmental oxygen 1 st diffuses into cells –Characteristics MoistMoist ThinThin In contact w/ environmental source of O 2In contact w/ environmental source of O 2

5. Respiratory System Bring oxygen to the respiratory surface & blood Remove CO 2 from blood and body

6. 1.Nasal cavity – Warms air and mucus catches dust.

7. 1.nasal cavity – 2.pharynx – (throat)

8. 1.nasal cavity – 2.pharynx – 3.Trachea (wind pipe) Larynx Larynx – voice box Larynx

9. 1.nasal cavity – 2.pharynx – 3.epiglottis 4.Trachea (wind pipe) Larynx Larynx – voice box 5.Bronchi (Bronchus)- (1 st branch) 6.bronchioles (Bronchiolus)- (all the branches in the lung) Larynx

10. the trachea, bronchi and bronchiole all contain cartilage ringscartilage rings MucusMucus CiliaCilia Holds tubes open so air flows freely Traps particles ( dust/pathogens) What do you think the function of each is? Pushes mucus towards esophagus to be swallowed

11. Alveoli Alveoli – Human respiratory surface the place where … Guess what the background picture is of? Alveoli are Air filled sacs Surrounded by Blood capillaries Why is it more efficient to have thousands of little sacs (alveoli) rather the 1 or 2 big sacs for gas exchange? CO 2 & O 2 exchange w blood

12. What’s this tube? What gas would diffuse from the alveoli into the blood? What gas would diffuse out of the blood and into the alveoli? Alveolus A B Capillary O 2 alveoli space -> blood capillaries CO 2 blood capillaries-> alveoli space

13. What’s a lung? Lung Lung – sac that contains the alveoli & brochioli & ends of the bronchi It has the texture and feel of a wet sponge

14. Answer the following questions 1.What is a respiratory surface? 2.What characteristics must a respiratory surface have? 3.What is the respiratory surface in humans? 4. What prevents the trachea from collapsing between breaths? 5. What helps prevent particles from getting into your lungs? Tuesday December 3 rd Bell work

15. CLOZE ACTIVITY Read the passage. Fill in the missing words using the word bank at the top of the page. Please do this quietly by yourself.

16. 4. What letter represents the alveoli in this diagram? what is the alveoli function A B C D

17. 5. What prevents the trachea from collapsing between breaths? 6. What helps prevent particles from getting into your lungs?

18. Breathing Involves the contraction and relaxation of your rib & diaphragm muscles

19. Inhaling  rib muscles pull ribs out,  diaphragm contracts & moves down (this creates more space in lungs) volume of lungs ∴ Air moves from high  low P ∴ air moves into lungs Pressure, Air moves from high  low P ∴ air moves into lungs

20. Exhaling  rib muscles & diaphragm relax Lung volumeLung volume Lung P, air moves from lungs to atmosphereLung P, air moves from lungs to atmosphere What controls the rate of breathing?

21. Respiratory rate is regulated by Medulla Measures pH – CO2 pH breathing &

22. 1.Inhaled oxygen diffuses from the alveoli into ___ 2.What type of blood cell carries oxygen? 3.Which way does the diaphragm move when it contracts? 4.Would you be inhaling or exhaling? 5.Emphysema & bronchitis both upset homeostasis in your body by … 6.What gas does your brain register in order to regulate breathing rate? 7.Would the diagram below represent a capillary in the alveoli or in some other body tissue? Explain. CO 2 O2O2

23. 8.What is this a diagram of? 9.What type of blood vessels are B 10.Which blood vessel A/C would be highest in oxygen? 11.Lowest in carbon dioxide