Answer:
Step-by-step explanation:
The air we breathe enters the lungs through the trachea. The trachea, also known as the windpipe, is a tube that connects the larynx (voice box) to the bronchi in the lungs. It is a flexible tube made up of rings of cartilage, which helps to keep it open and prevent it from collapsing.
When we inhale, air passes through the nose or mouth, then travels down the throat and into the larynx. From the larynx, it enters the trachea, which then branches out into two bronchi that lead to each lung. The bronchi further divide into smaller bronchioles, which eventually end in tiny air sacs called alveoli.
The trachea plays a crucial role in the respiratory system by providing a pathway for air to reach the lungs. It is lined with a layer of cells called cilia, which help to trap and move mucus and particles away from the lungs. This protective mechanism helps to prevent the lungs from getting clogged with debris and keeps them clear for efficient gas exchange.
In summary, air enters the lungs through the trachea, which is a tube connecting the larynx to the bronchi. The trachea is responsible for providing a pathway for air and plays a vital role in the respiratory system.