हिंदी

Give Suitable Explanations for the Following : - Biology

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प्रश्न

Give suitable explanations for the following :

One should breathe by nose and never by mouth. 

टिप्पणी लिखिए

उत्तर

One should breathe by nose and never by mouth because nose contains hair and mucous to trap dust and micro-organisms, so that the inhaled air becomes pure and the respiratory passage is free of dust and micro-organisms. 

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Types of Hygiene: Personal Hygiene
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 15: Hygiene - [A Key to Healthy Life] - Long answer type [पृष्ठ १५५]

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सेलिना Concise Biology [English] Class 9 ICSE
अध्याय 15 Hygiene - [A Key to Healthy Life]
Long answer type | Q 1.1 | पृष्ठ १५५
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