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<p style="text-align:justify;">Prana means vital force, and srotas means channels of transformation and transportation. The energies in the different biological settings are carried through the channels. Pranavaha srotasa carries the vital force throughout the body. It is placed first in the sequence of all srotasa<ref name="ref1">Pt Kashinatha Pandey and Dr. Gorakhnatha chaturvedi -Agnivesha charak samhita with ayurveda Dipika , commentary of chakrapani vimana sthana chapter no-5 , verse no. 6 Reprint  edition 2011, published by chaukhmbha Bharti Academy Varanasi p-710 .</ref> as it is responsible for sustaining life since birth to death [Cha.Sa. Vimana Sthana 5/6]. The other reason for prioritizing pranavaha srotasa is that pranavaha srotasa is more susceptible to disorders due to more frequent exposure to external environment than other constituent srotasa. Prana is among the five types of vata dosha, whose chief function is expiration (nishvasa).<ref name="ref2">Tripathy B.N Eds, Doshabedhiya Adhayaya , Astang Hridaya , Varanasi India ;chaukhmbha sanskrit Pratisthan , 2012 : 171 reprint .</ref> Thus, all the activities in which prana vayu is directly or indirectly involved denote life. Therefore, pranavaha srotas is the most important factor for longevity. This article describes the physiological and pathological aspects of Pranavaha Rottasa. </p>

<p style="text-align:justify;">[[Prana]] means vital force, and [[srotas]] means channels of transformation and transportation. The energies in the different biological settings are carried through the channels. Pranavaha [[srotas]] carries the vital force throughout the body. It is placed first in the sequence of all [[srotas]] [Chakrapani Cha.Sa.[[Vimana Sthana]] 5/6] as it is responsible for sustaining life since birth to death. [Cha.Sa. [[Vimana Sthana]] 5/6] The other reason for prioritizing pranavaha srotas is that it is more susceptible to disorders due to more frequent exposure to external environment than other constituent [[srotas]]. [[Prana]] is among the five types of [[vata dosha]], whose main function is expiration (nishvasa).<ref name="ref2">Tripathy B.N Eds, Doshabedhiya Adhayaya , Ashtang Hridaya , Varanasi India ;Chaukhmbha Sanskrit Pratisthan , 2012 : 171 reprint .</ref> Thus, all the activities in which [[prana]] vayu is directly or indirectly involved denote life. Therefore, pranavaha [[srotas]] is the most important factor for longevity. This article describes the physiological and pathological aspects of Pranavaha [[srotas]]. </p>

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<li style="font-weight: bold;">Hridaya: <span style="font-weight: normal;"><i>Charak</i> and <i>Sushruta</i> have considered <i>hridaya</i> as the origin of <i>pranavaha</i> and <i>rasavaha srotas</i>. The relationship of heart (<i>hridaya</i>) , pranavaha and rasavaha srotas reflects the pulmonary and circulatory systems as per contemporary science.</span></li>

<li style="font-weight: bold;">Hridaya: <span style="font-weight: normal;"><i>Charak</i> and <i>Sushruta</i> have considered <i>hridaya</i> as the origin of <i>pranavaha</i> and <i>rasavaha srotas</i>. The relationship of heart (<i>hridaya</i>) , pranavaha and rasavaha srotas reflects the pulmonary and circulatory systems as per contemporary science.</span></li>

<li style="font-weight: bold;">Mahasrotas: <span style="font-weight: normal;"><i>Mahasrotas</i> is a gastrointestinal tract-like structure. It is the abode of <i>amashaya</i> and <i>pakwashaya</i> (stomach, small intestine, and large intestine).</span></li>

<li style="font-weight: bold;">Mahasrotas: <span style="font-weight: normal;">It is a gastrointestinal tract-like structure. It is the abode of <i>amashaya</i> and <i>pakwashaya</i> (stomach, small intestine, and large intestine).</span></li>

<li style="font-weight: bold;">Dhamani: <span style="font-weight: normal;"><i>Dhamani</i> carries the essence of digested food (<i>rasa</i>) all over the body and maintains the nutrition (<i>poshana</i>).</span></li></ol>

<li style="font-weight: bold;">Dhamani: <span style="font-weight: normal;"><i>Dhamani</i> carries the essence of digested food (<i>rasa</i>) all over the body and maintains the nutrition (<i>poshana</i>).</span></li></ol>

== Other sites of prana ==

== Other sites of prana ==

<p style="text-align:justify;">There are ten principal seats in which the life forces (prana) are established. The two temples (shankha), the three vital organs including heart (hridaya), the head region mainly brain (shira), the bladder including kidneys (basti), throat (kantha), rakta dhatu (blood), shukra dhatu (reproductive fluid), oja (the vital fluid) and the anus. [Cha.Sa.Sutra Sthana 29/3] These ten sites are related to pranavaha srotasa. The disorders affecting these sites cause vitiation of pranavaha srotasa.</p>

<p style="text-align:justify;">There are ten principal seats in which the life forces (prana) are established. The two temples (shankha), the three vital organs including heart (hridaya), the head region mainly brain (shira), the bladder including kidneys (basti), throat (kantha), rakta dhatu (blood), shukra dhatu (reproductive fluid), oja (the vital fluid) and the anus. [Cha.Sa.Sutra Sthana 29/3] These ten sites are related to pranavaha srotasa. The disorders affecting these sites cause vitiation of pranavaha srotas.</p>

== Causes of abnormalities (pranavaha srotas dushti nidana): ==

== Causes of abnormalities (pranavaha srotas dushti nidana) ==

<p style="text-align:justify;">Wasting or degeneration of tissues (kshaya),  suppression of natural urges (sandharana),  excess exertion(vyayama), excess hunger (kshudhita), excessive dryness (ruksha), exposure to cold (sheeta) in lifestyle and dietary pattern with harmful regimens lead to abnormalities to pranavaha srotas.<ref name="ref6">Prof. Dinkar Govind , Thatte , Sushrut samhita Sharirsthanam , section on the study of Human body 1 st edition , chahukhmbha orientalia , Varanasi , 1994, Page 173.</ref> Suppression of thirst (pipasa dharana) also leads to vitiation of pranavaha srotasa.  </p>

<p style="text-align:justify;">Wasting or degeneration of tissues (kshaya),  suppression of natural urges (sandharana),  excess exertion(vyayama), excess hunger (kshudhita), excessive dryness (ruksha), exposure to cold (sheeta) in lifestyle and dietary pattern with harmful regimens lead to abnormalities to pranavaha srotas.<ref name="ref6">Prof. Dinkar Govind , Thatte , Sushrut samhita Sharirsthanam , section on the study of Human body 1 st edition , chahukhmbha orientalia , Varanasi , 1994, Page 173.</ref> Suppression of thirst (pipasa dharana) also leads to vitiation of pranavaha srotasa.  </p>