1. Learning Target: Identify the main function of the respiratory system
Friday March 24, 2017
Learning Target: Identify the main function of the respiratory system
Science Starter:
HW 21—2CD
(Name the organs in the respiratory system)
4CDE
Supplies—Workbook and HW 21

2. Daily Agenda 1. Heartbeat
2. Circulatory, Respiratory, Excretory, and Immune System—Open Note Test March 30
3. HW 21 Due—Friday March 31
4. Respiratory System Notes
5. Respiratory System Video
6. Exit Ticket—Respiratory System

3. Respiratory System

4. Functions of the Respiratory System
Supply oxygen to the blood
Remove carbon dioxide from the blood

5. What is the function of the respiratory system?
To provide oxygen & carbon dioxide to the body cells.
To provide carbon dioxide to body cells & remove oxygen.
To provide oxygen to body cells & remove carbon dioxide.
To remove oxygen & carbon dioxide from the body cells. 1 2 3 4 5

6. Organs of the Respiratory System
Nose & Mouth
(air enters through the nostrils & mouth)
Nasal cavity = air
is cleaned, warmed,
and moistened

7. Organs of the Respiratory System
Throat
Pharynx =
passageway for both
food and air

8. Organs of the Respiratory System
Throat
Epiglottis = flap that
closes over the
larynx when
swallowing to keep
food & water out

9. Organs of the Respiratory System
Throat
Larynx = air only;
vocal chords are
attached here

10. Organs of the Respiratory System
Throat
Trachea (windpipe) =
c-shaped rings of
cartilage keep it
open all the time

11. Which of these does the nasal cavity NOT do to inhaled air?
Clean
Warm
Moisten
Condense 1 2 3 4 5

12. What is the flap called that prevents food from entering the larynx?
Pharynx
Epiglottis
Larynx
Trachea 1 2 3 4 5

13. What is the first structure that only air can pass through (not food)?
Mouth
Pharynx
Larynx
Trachea 1 2 3 4 5

14. Organs of the Respiratory System
Lungs
(where oxygen &
carbon dioxide are
exchanged)

15. Organs of the Respiratory System
Lungs
(where oxygen &
carbon dioxide are
exchanged)
Bronchi = 2 small
branches at end of
trachea; carry air
into lungs

16. Organs of the Respiratory System
Lungs
(where oxygen &
carbon dioxide are
exchanged)
Bronchioles =
smaller branches
off of bronchi

17. Organs of the Respiratory System
Lungs
(where oxygen &
carbon dioxide are
exchanged)
Alveoli = tiny, grape-
like sacs at the end
of bronchioles;
surrounded by
capillaries

18. Organs of the Respiratory System
Diaphragm
(muscle below the
lungs that helps move
air in and out of the
body)

19. What is this structure called?
Diagram
Diagonal
Diaphoresis
Diaphragm 1 2 3 4 5

20. What causes you to exhale?
Your lungs contract to squeeze the air out.
Your diaphragm moves up, pushing air out of the lungs.
Your ribs squeeze the air out of your lungs.
Your diaphragm moves down, letting air escape from your lungs. 1 2 3 4 5

21. Gas Exchange in the Lungs
Takes place between alveoli and capillaries

22. Gas Exchange in the Lungs
Takes place between alveoli and capillaries
INHALE
oxygen enter body
into alveoli
into capillaries
into blood
to body cells

23. Gas Exchange in the Lungs
Takes place between alveoli and capillaries
EXHALE
leaves body
into alveoli
into capillaries
into blood
CO2 from body cells

24. Where does the exchange of oxygen and carbon dioxide occur?
The heart
The alveoli
The pharynx
The body cells

25. What carries the blood back to the heart after it picks up oxygen from the alveoli?
Lungs
Aorta
Pulmonary artery
Pulmonary vein

26. Exit Ticket