Summary of The Respiratory System

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The respiratory system helps the body breathe by collecting air in the nose, filtering it, and sending it down the trachea to the lungs. The trachea branches into smaller tubes called bronchioles, which end in air sacs called alveoli. Oxygen passes through the alveoli and into the bloodstream, where it is circulated throughout the body.

• 00:00:00 The respiratory system helps the body to breathe air and exchange gases. The respiratory system includes the nose, throat, voice box, windpipe, and lungs. The nose collects air and filters out dust and other particles. The air then enters the mouth, and the two airways meet at the pharynx. The pharynx carries both food and air and is used for digestion and respiration. One path is for food, and this is called the esophagus. The other path is for air, and this is called the trachea. The trachea is a small flap of tissue that stops food and liquid from going into the lungs. The larynx or voice box is located at the top of the trachea. The air only pipe this is where our vocal cords are. The trachea is also lined with tiny hairs that sweep foreign particles and fluids out of the airway. The windpipe divides into two branches and each one of these branches enters one of the two lungs. Each branch resembles the limbs of a tree and divides into smaller finer branches called bronchioles. The bronchioles end in tiny air sacs called alveoli. The oxygen passes through these air sacs and travels through the capillary