The nasal cavity warms and moisturizes inhaled air, filtering contaminants like dust, mold, and pollen with its hairs and mucus lining.
The pharynx is a 5-inch tube directing air from the nasal cavity to the lungs. It serves both respiratory and digestive functions, divided into nasopharynx, oropharynx, and laryngopharynx.
The larynx, or voice box, allows only air through the trachea, preventing food blockage. It houses vocal folds, controlling pitch and volume, and protects the airway by triggering reflexive actions.
Trachea
The trachea, or windpipe, connects the larynx to the bronchi and lungs. It transports air during respiration and is supported by flexible cartilage rings for movement and flexibility.
The trachea splits into bronchi, each leading to a lung. They branch into bronchioles and alveoli for gas exchange, transporting oxygen to the lungs and expelling carbon dioxide
Lungs, located on either side of the chest, facilitate gas exchange between alveoli and blood vessels, providing oxygen and expelling carbon dioxide. Learn more at eTutorWorld.com.