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ACTIVITY NO.4 : THE RESPIRATORY CROSSWORD Aur is inhaled through the mouth and nose Air cavities called sinuses are in the head. The air goes through the pharynx, and the trachea which divides and goes into each lung. The trachea is made up of cartilaginous rings. The lungs add oxygen to the blood and gets rid of carbon dioxide This exchange of gases takes place in the tiny numerous ar sacs called alveoli by way of very small capillaries. Once the trachea has divided, the two parts are the bronchial tubes. Your right lung has three lobes, your left kung has two lobes. The phrenic nerve controls breathing which is an involuntary process. The diaphragm and nb cage move down and inward when air is inhaled Membranes surrounding the lungs and diaphragm are the pleura which provide a thin watery cushion. Down 1 vessels to body 2. ung with two loves 3. Strong breathing muscle 4 lung with three lobes 5 Thick fuid in the sinuses 6 eement of living things 7 wirdp ce 8. Brongnia! 9 protects ungs and heart 10. try has 11. let out at 12 air sacs 13. carries oxygen 14. desohbes sinuses Across 1.using air 2.oragans for breating 3.opeing for air 4.membranes 5.4-chambered oragan 6.bone like substance 7.what we breathe 8.alveoli 9.part of lung 10.vessels to heart 11.describes bearthing 12.elemant we need to live
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