Question

mention the role of following 1. Nasal passages, 2.alveoli of lungs ,3.ribs in breathing 3.haemoglobin , 5 epiglottis ​

Answer 1

Answer:

1. Nasal passages - The nasal cavity functions to allow air to enter the respiratory system upon respiration. Structures within the cavity regulate the flow of air and particles it contains. The olfactory region of the nasal cavity regulates the sense of smell.

2. Alveoli of lungs - Alveoli are an important part of the respiratory system whose function it is to exchange oxygen and carbon dioxide molecules to and from the bloodstream. These tiny, balloon-shaped air sacs sit at the very end of the respiratory tree and are arranged in clusters throughout the lungs.

3.Ribs in breathing - The ribs protect the lungs and expand as we inhale to facilitate space for the lungs to expand like the diaphragm. The ribs then contract expelling the air in the lung.

4. Haemoglobin - Hemoglobin in blood carries oxygen from the lungs or gills to the rest of the body (i.e. the tissues). There it releases the oxygen to permit aerobic respiration to provide energy to power the functions of the organism in the process called metabolism.

5. Epiglottis -  ​The epiglottis is a leaf-shaped flap in the throat that prevents food from entering the windpipe and the lungs.

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