Select the answer below that best describes how the lungs are kept free of germs and dirt from the air. (1 point) Responses The alveoli act as filters for the lungs collecting particles of dirt and germs to be exhaled when the diaphragm relaxes. The alveoli act as filters for the lungs collecting particles of dirt and germs to be exhaled when the diaphragm relaxes. Tiny hairs known as cilia clean the trachea of dirt and germs before it can enter the lungs. Tiny hairs known as cilia clean the trachea of dirt and germs before it can enter the lungs. Hairs known as cilia, found inside the alveoli, collect the dirt and germs to be expelled from the lungs. Hairs known as cilia, found inside the alveoli, collect the dirt and germs to be expelled from the lungs. Mucus found in the bronchial tubes collects dirt and germs that gets into your lungs. Tiny hairs called cilia work to sweep out the debris collected to keep your lungs clean.
Tiny hairs known as cilia clean the trachea of dirt and germs before it can enter the lungs.
The correct answer is: Tiny hairs known as cilia clean the trachea of dirt and germs before it can enter the lungs.
The correct answer is: Tiny hairs known as cilia clean the trachea of dirt and germs before it can enter the lungs.
Explanation: When we inhale, the air passes through the trachea (windpipe) before reaching the lungs. The trachea is lined with tiny hair-like structures called cilia. These cilia move in coordinated motions, sweeping in an upward direction, to help remove particles of dirt and germs that may be present in the air. This movement of cilia is an important mechanism to protect the lungs from pollutants and pathogens. Therefore, the correct answer is the one that describes the role of cilia in cleaning the trachea, which is option 2: "Tiny hairs known as cilia clean the trachea of dirt and germs before it can enter the lungs."