breathing and the Respiratory system.pptx

breathing and the Respiratory system

1. Breathing and the Respiratory System Start 13 th of October 202 5 Time (80 min)

2. To explain the differences between inhaling and exhaling, Students discuss with a partner and note down ideas. "What happens to your body when you take a deep breath in and when you exhale?" Page 96 Breathing

3. Explain how the diaphragm and intercostal muscles work together during inhaling and exhaling. Compare the changes in pressure, volume, and the movement of muscles during both inhalation and exhalation. Define inhalation and exhalation and identify the main muscles involved. Lungs, rib cage, inhalation, exhalation Intercostal muscles Diaphragm

4. Parts Of The Respiratory System Nose Epiglottis Trachea (Wind Pipe) Lungs BRONCHI Bronchioles Alveoli Diaphragm

5. Group Work Discuss to Draw a T-table to compare breathing vs respiration: Breathing Respiration It’s the process of taking in oxygen and releasing carbon dioxide. It’s the process of releasing energy in the form of ATP from food (glucose) and oxygen. Occurs in Lungs Occurs in Mitochondria Taking in Oxygen and release carbon dioxide Oxygen + glucose  water + carbon dioxide + ATP (energy)

6. Learning Points You have 2 lungs, one on each side of your chest. They are protected by the rib cage. They are spongy as they are full of air. They exchange gases, oxygen leaves the lungs to the blood and carbon dioxide enters them from the blood. When breathing in, the ribs move out and up and the diaphragm moves down. To breathe out, the ribs move in and down, the diaphragm moves up.

7. Observe this picture to recognise how do ribs move? Through contraction and relaxation of the Intercostal muscle. The second muscle is the diaphragm.

8. Breathing Your breathing organs are the lungs, ribcage and diaphragm. If you could see inside your body, you would find them in the upper chest

9. This X ray shows the lungs in the ribcage The person is facing you so the dark area near me is the left lung Can you make out that the left lung is slightly smaller to make room for the heart? The arrows are pointing to the diaphragm You can see the ribcage and other bones. keyposters.com

10. The diaphragm is a very powerful muscle. Watch how it controls breathing When the diaphragm moves down … the lungs expand and air is drawn in. When the diaphragm moves up … the lungs are squeezed and air is forced out And it all happens without you trying! How do we breathe? diaphragm http://www.biotopics.co.uk/humans

11. In the class we can’t see how our or other people’s lungs work. However, we can look at a model of how the lungs work. Remember When we breathe out the ribs move in and down. 2. The diaphragm relaxes and moves upwards. How do we breathe?

12. Observe this image to compare inhaling vs exhaling

13. http://tre.ngfl.gov.uk/server.php?request=cmVzb3VyY2UuZnVsbHZpZXc%3D&resourceId=80

14. Group discussion set 1/2 Task 1: Discuss the differences between inhaling and exhaling Task 2: Draw a Ven diagram to compare inhaling and exhaling. Relate volume to pressure = Physics Extension Inhaling Exhaling

15. Check answers INHALING EXHALING PROCESS ARE RELATED TO BREATHING OCCUR IN LUNGS

16. Group discussion Set 3 Task 1: Discuss the differences between inhaling and exhaling Task 2: Draw a T-table to compare inhaling and exhaling. Inhaling Exhaling Diaphragm ____________ and move __________________. Diaphragm ____________ and move __________________. Intercostal muscle ___________________ Intercostal muscle ___________________________ Ribs move _________________ and ______________________ Ribs move _________________ and ______________________ Volume of lungs will ____________________ Volume of lungs will __________________________ Move of air _________________ Move of air _____________________

17. Group discussion Set 3/4 Task 1: Discuss the differences between inhaling and exhaling Task 2: Draw a T-table to compare inhaling and exhaling. Inhaling Exhaling Diaphragm __CONTRACTS__ and move _DOWNWARDS__. Diaphragm __RELAXES_ and move __UPWARDS___. Intercostal muscle __CONTRACTS_____ Intercostal muscle _____RELAXES_____ Ribs move ___OUTWARD___ and __UPWARD____ Ribs move __INWARD____ and ___DOWNWARDS____ Volume of lungs will ___INCREASE_____ Volume of lungs will ____DECREASE______ Move of air ___INSIDE___ Move of air ___OUTSIDE_____

18. Put your hands on your chest and breath in and out SLOWLY. Can you feel your chest going up and out when you breath in? What happens to it when you breath out? How do we breathe?

19. Think/Pair/Share (3 min) Discuss to solve questions 1 to 4 page 145 Early finishers will solve questions 1 to 3 page 134

20. Questions page 125 Q1) The intercostal muscle and diaphragm help you to breathe. Q2) They work together to increase the volume of the chest. The intercostal muscle contracts to bring your ribs up and out . The diaphragm contracts and goes down . The increased in the volume makes air rush into your lung. Q3) lungs contain air so they are less dense than water. Q4) Nose/Mouth  trachea  Bronchi  Bronchioles  air sacs (alveoli) –> Blood capillaries

21. Explain how the diaphragm and intercostal muscles work together during inhaling and exhaling. Compare the changes in pressure, volume, and the movement of muscles during both inhalation and exhalation. Define inhalation and exhalation and identify the main muscles involved. Have students explain to a partner the difference between inhalation and exhalation, using key vocabulary like diaphragm and intercostal muscles. Conclude with a Q&A session, asking students to summarize what happens during each phase of breathing. Students will solve self-assessment for them to make self-check and track progress.

22. Plenary (self assessment) 4 min Solve page 4 in the worksheet provided. ANSWER KEY