22. निम्नलिखित पर टिप्पणी लिखिए-
(a) एस्फिक्सिआ (Asphyxia) (b) प्लूरिसी
(d) निःश्वसन।
23. श्वासनाल को परिभाषित कीजिए।
(c) निश्वसन
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The preventive measures can be taken to avoid infection of various diseases. The most common measure is the maintenance of hygienic condition.
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