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Topic:Lesson 1: Humans breathe

1. Human need __air_____ to breathe. Humans use their

 ___lungs____ to breathe.

2. When we inhale (take in) our chest _epands______.!. When we ehale (let out) our chest contracts________.

". The number o# rate o# breathing is the number o# chest

mo$ement.

%. The air that #lows into the lungs contains more

 ____o&gen_______ and air that #lows out contains more

 __carbon____ ___dioide______.

'. s we inhale the chest rises outwards and upwards causing the

chest to ___epand_______. The air is taken in through the __nose___ down the ____windpipe________ into the

 ___lungs_____. The air contains more ___o&gen________.

*. s we ehale the chest mo$es in causing the chest to

 ____contract___. The air inside the lungs then #lows out #rom

the ____lungs___ to the _____windpipe_____ and then out

through the __lungs___. The air contains more __carbon

dioide_.

+n#o:

Humans le#t lung is more smaller then right lung because our heart

is near the le#t lung. ,ur ribs protect our lungs #rom in-ured while

diag#ram help to control the air pressure in the lungs.

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TH /T ,0 /TH+3

1. The rate o# breathing is the number o# chest mo$ement

upward and downward in a minute.

456T+,6.

1. 3i$e operational de#inition #or the rate o# brething #rom

in$estigation abo$e.

TH+7 8 6W/62. Wh& our lungs ha$e a better #unction when &ou are acti$e in

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