Question

State the role of the following in human respiratory system
1.nasal hairs
2.diaphragm
3.alveoli
4.nasal cavity

Answer 1

1 Nasal hair or nose hair is the hair in the nose. Adult humans have hair in the interior nasal passage. Nasal hair functions include filtering foreign particles from entering the nasal cavity
and collecting moisture.

2 The diaphragm separates the thoracic cavity, containing the heart and lungs, from the abdominal cavity and performs an important function in respiration: as the diaphragm contracts, the volume of the thoracic cavity increases and air is drawn into the lungs

3 At the same time, carbon dioxide (CO2) is transmitted from the blood capillaries into the alveoli and then expelled through the bronchi and the upper respiratory tract. The inner surface of the lungs where the exchange of gases takes place is very large, due to the structure of the air sacs of the alveoli.

4 The nasal cavity is a hollow space within the nose and skull that is lined with hairs and mucus membrane. The function of the nasal cavity is to warm, moisturize, and filter air entering the body before it reaches the lungs.

Answer 2

Answer:

1. Nasal hairs:

Dust, pollen, and allergens are kept out of your lungs by the filtering action of your nose hairs. Particles that enter your nose become trapped on your hairs' thin covering of mucus when it rains.

2. Diaphragm:

Your chest and abdomen are separated by your diaphragm (belly). Your diaphragm not only facilitates breathing but also builds pressure inside your abdomen.

3. Alveoli:

While breathing in and out, oxygen and carbon dioxide are exchanged between the blood and alveoli in the lungs.

4. Nasal cavity:

Through the utilization of the muco ciliary system, the nasal cavity serves to humidify, warm, filter, and act as a conduit for inspired air in addition to defending the respiratory tract.

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