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Respiratory System and Ventilation (Lungs in the THORAX (Thorax (Top of…
Respiratory System and Ventilation
Lungs in the THORAX
Thorax
Top of your body
Separated from the diaphragm
Lungs are like pink sponges
Surrounded by PLEURAL MEMBRANES
Lungs are protected by the RIBCAGE
INTERCOSTAL MUSCLES- run between them
Air goes through the TRACHEA
Splits into 2 tubes- BRONCHI
Bronchi splits into BRONCHIOLES
Bronchioles end up as small bags called ALVEOLI
Gas exchange takes place
Breathing In
INTERCOSTAL MUSCLES and DIAPHRAGM contract
Thorax volume increases
Decreases pressure drawing air in
Breathing Out
Intercostal muscles and diaphragm RELAX
Thorax volume decreases
Air is forced out