Labels:book | donut | hakham | plaything | poster | sky OCR: RESPIRATION Respiration in Humans As the diaphragm contracts pue 4 drowninto Inhalation lunas Air furLed Exhalation UU. ur WELS .ow ves downwards, the pectoralis pue intercostal muscles Pectoralis ontrac' minor nuSc Pe-toralis relax ninor muscles pull the rib cage Trache Tacrea The chest cavity Lungs expand Lungs contr spuedxa and air rushes into the lungs through the trachea to fill the resulting vacuum When the diaphragm relaxes to normal, curving position, the lungs contract pue nte. costal Intercostal air is forced out. mi.srles musrle contract rela Diephragm cont act Diaphragm relaxes anc flatter and more In this life -supporting process oxygen from incoming air enters the blood pue carbon a waste gas from the metabolism of food, is exhaled into the atmosphere The exchange of gases ta ...
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