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KAJIANTINDAKAN 2010TEKNIK DRAWING DIAGRAM BAGI

BAB 1 SAINS TINGKATAN 3,

RESPIRATION

OLEH:

PN DURASNITA ABDULLAH

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Mengenali Struktur Paru-paru

NASAL CAVITY

NOSTRIL

TRACHEA

BRONCHUS

DIAPHRAGM

LUNG

RIB

INTERCOSTAL MUSCLE

BRONCHIOLE

ALVEOLUS

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DRAWING DIAGRAM

Breathing Mechanisme- inhalation

1. The external intercostal muscles

contract

2. The rib cage moves upwards and

outwards3. The diaphragm contracts and

flattens

4. The volume of thoracic cavity

increases5. The air pressure in the thoracic

cavity decreases

6. Air enters the lungs

VOLUME

1. & 2.

3.

4.

5.

6.

AIR

PRESSURE

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DRAWING DIAGRAM

Breathing Mechanisme- exhalation

1. The external intercostal muscles

relax

2. The rib cage moves downwards

and inwards3. The diaphragm relaxes and curves

upwards

4. The volume of thoracic cavity

decreases5. The air pressure in the thoracic

cavity increases

6. Air forced out of the lungs

VOLUME

1. & 2.

3.

4.

5.

6

.

AIR

PRESSURE