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RespirationRespiration

Please note – the animation effects used in the “Circulation” slide only work in PowerPoint XP

11/04/23

RespirationRespiration

Words – breathing, energy, Mrs Gren, respiration, food

A while ago we learnt about ___ ______. Each of these life processes needs ENERGY. ___________ is the process our bodies use to produce this energy:

Glucose + oxygen water + carbon dioxide + ENERGY

The glucose we need comes from ______ and the oxygen from _________. Water and carbon dioxide are breathed out. The MAIN product of this equation is _________.

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Gas ExchangeGas ExchangeAir breathed in Air breathed out

79% 79%

21% 18%0.03%

3%

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BreathingBreathing

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The Respiratory SystemThe Respiratory System

Ribs – to protect the

chest

Bronchioles

Bronchi Trachea – has stiff rings of cartilage to prevent it collapsing

Rib muscles – to raise and lower the ribs

Lung

Diaphragm – muscular sheet

Alveoli (“air sacs”) – gas

exchange takes place here

11/04/23Gas exchangeGas exchange

Alveoli are very good at exchanging gases because…

1) They have a LARGE surface area

2) They have a good blood supply

3) They are moist

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CirculationCirculation1) Blood gets pumped from the heart to the lungs and picks up oxygen

2) The blood is then taken back to the heart…

3) The heart pumps the blood to the intestine (where oxygen and glucose are removed)…

4) … and to the rest of the body (where oxygen is removed)

5) After the oxygen and glucose have been removed for respiration the blood is sent back to the heart and starts again