respiration
Respiration is not breathing!!!
respiration is the break down of glucose to release energy
to write a word equation for respiration glucose energy carbon dioxide water oxygen Use the words above to write a word equation for respiration
Respiration occurs in all living organisms
including plants !!!
Plants During the day: respiration & photosynthesis At night: respiration only
the lungs and breathing
Respiratory System What do you know????
The Human Respiratory System BRONCHUS BRONCHUS TRACHEA BRONCHIOLE RIB LEFT LUNG MUSCLE AIR SAC DIAPHRAGM
trachea mouth bronchus air sacs bronchioles
Breathing movements Breathe in Breathe out Diaphragm Contracts Relaxes Muscles between ribs Contract Relax Rib cage Moves up & out Moves down & in Volume of chest cavity Increases Decreases Pressure in chest cavity Air Moves in to lungs Pushed out of lungs
How do gases get into our blood from the air? Gas exchange takes place in the alveoli, the little round structures (‘air sacs’) at the end of the bronchioles in our lungs.
How do gases get into our blood from the air? Carbon dioxide leaves the blood and enters the alveoli, while oxygen leaves the alveoli and enters the bloodstream. This movement of gases between the alveoli and blood is called gas exchange.
Our lungs contain millions of alveoli Our lungs contain millions of alveoli. Each alveolus is wrapped up in tiny blood vessels called capillaries. It would be worth bringing in a net of oranges to show this idea The net around the oranges is like the network of capillaries around the alveoli
enters the bloodstream Complete the diagram and stick it into your notes Carbon dioxide is breathed out Oxygen is breathed in capillary Oxygen enters the bloodstream Carbon dioxide enters the alveolus
How big are your lungs? The bigger the lungs are the more oxygen can enter and carbon dioxide can leave the lungs. To allow the maximum amount of oxygen and carbon dioxide to enter and leave the lungs, their size is extremely important. The size of the lungs is measured as lung volume.
Values for lung volume are sometimes taken as a measure of lung function i.e. how well the lungs are working. Reduced lung volume is a feature of the condition of asthma, that affects many people.
Measuring lung volume You can measure lung volume using the information on P113 of the Y9 textbook. Plot the results for lung volume for each person in your class against their height. Is there a link? Your teacher may also be able to show you a ‘peak flow meter’, which lets you measure lung function.
Asthma animation
Why worry about asthma? What are the symptoms of an asthma attack? The person may struggle to breathe. If a person has an asthma attack, what important gas may be decreased in their body? Oxygen Why is an asthma attack dangerous? The person may not get enough oxygen to allow their cells to respire. Why is respiration a vital process in every cell? Respiration provides energy for all the cell’s activities that keep us alive.
Summa r y
smoking machine video