P2 EXERCISE 1D – FILLING IN THE GAPS
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EXERCISE 1D – RESPIRATORY SYSTEM
Fill in the gaps with the words form the box.
trachea, pharynx, efficient respiration, airflow, sound production, breathing, rib cage, bronchioles, expelled, larynx, breathe, voice box, windpipe, lungs, respiratory system, nasal passages
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The begins with the nasal passages and pharynx, which filter, warm, and humidify the air we . The , lined with mucus and tiny hairs (cilia), trap dust and pathogens, while the , a shared pathway for air and food, directs air to the .
Larynx, or , houses the vocal cords and plays a role in . Below the larynx is the trachea, or , a tube that conducts air from the larynx to the bronchi. The trachea is reinforced with cartilage rings to keep it open, ensuring unobstructed to the lungs.
The divides into two bronchi, each leading to one lung. Within the lungs, the bronchi branch into smaller , ending in alveoli, tiny air sacs where gas exchange occurs. Oxygen from the air passes into the bloodstream, while carbon dioxide is from the body during exhalation.
Respiratory muscles, including the diaphragm and intercostal muscles, are essential for . The diaphragm contracts during inhalation, creating a vacuum that draws air into the , while the intercostal muscles assist by expanding and contracting the . Together, these components ensure , vital for life.
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