peshi

peshi ki sanrachana

peshi (Muscle) praaniyon ka aakunchit hone wala (contractile) ootak hai. inmein aankunchit hone vaale sootr hote hain jo koshika ka aakaar badal dete hain. peshi koshikaaon dvaara nirmit us ootak ko peshi ootak kaha jaata hai jo samast angon mein gati utpann karta hai.[1] is ootak ka nirmaan karne waali koshikaaen vishesh prakaar ki aakruti aur rachana waali hoti hain. inmein kunchan karne ki kshamata hoti hai. peshiya rekhit, arekhit evam hrudaya teen prakaar ki hoti hain. manushya ke shareer mein 40 pratishat bhaag peshiyon ka hota hai.

anukram

vargeekaran

teen prakaar ke peshi ootak

shareer mein teen prakaar ki peshiyaaain pai jaati hai :

(1) rekhaankit (skeletal) (2) arekhaankit (smooth) aur (3) hrud peshi (cardiac muscles)

rekhaankit peshiyaaain aichhik hoti hain (arthaat‌ ichha hone se sankuchit honevaali) aur asthiyon par lagi rahati hain. shareer ki gati : chalana firna, daudna, pakadna, khade hona - inheen peshiyon ke aakunchan aur prasaar ka fal hai.

arekhaankit peshiyaaain hamaari ichha ke adheen naheen hai. ve svat: hi aakuchit aur prasarit hoti hai. saari paachanapranaali, grasanika se lekar guda tak, mein in peshiyon ka pradhaan bhaag rahata hai. aanvagati inheen ki kriya ka fal hoti hai. pratyek nalika raktavaahiniyon tatha aashayon ki bhittiyaaain pradhaanat: inheen peshiyon ki bani hoti hai.

hrud peshiyon ki rachana yadyapi aichhik peshi ke samaan hoti hai, tathaapi ve ichha ke adheen naheen hoteen, svat: hi sankoch aur prasaar karti rahati hai. vaastav mein yeh siddh ho chuka hai ki hrudaya ki peshi mein svat: aakunchan karne ki shakti hoti hai, jo naadi niytran se bilkul svatantr hai.

rachana

pratyek peshi sootron ka samooh hoti hai. ye sootr peshi ko lanbaai ki or cheerane se ek doosare se pruthak kiye ja sakte hain. ye sootr bhi sootraanuon (fibrils) ke bane hote hain. pratyek sootr par ek aavaran rahata hai, jiske bheetar kai keindrak hote hain. pratyek sootr par ek aavaran rahata hai, jiske bheetar kai keindrak hote hain aur koshikaasaar bhara rahata hai, jiske bheetar kai keindrak hote hain aur koshikaasaar bhara rahata hai. kankan ki deergh peshiyon mein 5 inch tak lambe aur 0.01 se 0.1 mileemeetar vyaas tak ke sootr paae jaate hain. chhote aakaar ki peshiyon mein sootr bhi chhote hain aur praarambh se kandara tak vistrut hote hain. badi peshiyon mein kai sootr apne siron par milkar peshi ki lanbaai ko poorn karte hain. pratyek sootr mein naadi ka ek sootr jaata hai. yahaaain vah shaakhaaon mein vibhkt ho jaata hai jinke antim bhaagon ke chaaron or koshikaasaar mein kuchh kan ekatr rahate hain. ye sthaan ant:patt (end plate) kahalaate hain. inheen mein hokar uttejanaaeain sootron mein jaati hain, jinse peshi aakunchan karti hai.

aichhik peshi ke sootron ki prakaash dvaara pareeksha karne se ve lanbaai ki or khandon mein vibhkt padte hain, jinmein se ek prakaashaheen aur doosra prakaashamaya khand baari baari se sthit hai, arthaat‌ prakaashamaya ke pashchaat‌ prakaashaheen aur uske pashchaat‌ fir prakaashamaya. prakaaheen khand ke donon siron par chaudaai ki or bindu dikhaai dete hein, jo aapas mein chaudaai ki or atyant sookshm rekhaaon se jude hue hain. aisi hi rekhaaeain sootr ki lanbaai ki or bhi in binduon ko jode hue hain. yahi rekhaajaal (straition) kahalaata hai, jo anuprasth aur anudairdhya donon prakaar hai. pratyek sootraanu mein yeh drushya deekhata hai. ye sootraanu antassootraanu vastu dvaara guchhon mein baindhe hain, jinke chaaron or pesheesaar (sarcopl) sthit hai aur jismein keindrak (nucleus) sthit hai.

anaichhik pesheesootr chhote hote hain. pratyek sootraanu ek lanbotare aakaar ki koshika hota hai, jo ek sire par chapata sa hota hai aur doosare par lamba, jahaaain vah kadara mein lag jaata hai. iski lanbaai ki or rekhaaeain bhi dikhaai padti hain. ek koshika ki lanbaai 200 maaikron aur chaudaai 4 se 7 maaikron se adhik naheen hoti. ye rekhaankit naheen hoti. inmein ek hi keindrak hota hai. ye peshiyaaain staron mein sthit hoti hain, jinmein sootraanu ya sootrakoshika apne siron se mili rahati hai. aashaayon ya aantranaal mein ye peshiyaaain do staron mein sthit hain. ek star aantr ki lanbaai ki or sthit hai aur doosra usako chaudaai ki or se ghere hue hai. isko anuvruttakaar aur anudairdhyan star kaha jaata hai. in donon staron ke sankoch se naali ke bheetar ki vastu aage ki or ko sancharit hoti hai.

haardik pesheesootr in donon ke beech mein hain. pratyek sootr ek koshika hai, jisse anudairdhya aur anuprasth donon prakaar ka rekhaankan dikhaai deta hai. kintu ye sootr ichha ke adheen naheen hai. koshikaaon mein visheshata yeh hai ki unase shaakhaaeain niklati hain, jo doosari koshikaaon ki shaakhaaon mein mil jaati hai.

peshi ke gun

peshi ka vishesh gun aakunchan karna hai, jisse usaki lanbaai kam aur chaudaai adhik ho jaati hai, arthaat‌ vah chhoti aur moti ho jaati hai. aakunchan ke samay jis sthaan se usaka udgam (origin) hota hai vah bhaag khinchakar pratham ke paas pahuainch jaata hai. si se shareer ke angon ki gati hoti hai. aakuchan ke pashchaat‌ peshi fir prasarit hokar apni poorv avastha mein aa jaati hai. aichhik peshiyon mein aakunchan un uttejanaaon ke parinaam hote hain jo mastik ya sushumna ke keindron se naadiyon dvaara peshiyon mein aati hai. manushya ki peshi ek seked mein 10 ya 12 baar se adhik sankoch naheen kar sakti. makkhi ki peshi 400 baar sankoch kar sakti hai. yadi peshi mein jaanevaali naadi ko uttejit kiya jaaya, to uttejit sthal par vidyudvibhv (potential) utpann ho jaata hai aur yahaaain se donon or ko vidyutpravaah hone lagta hai. iski vidyunmaapi se naapa ja sakta hai.

pratyek aakunchan mein oorja ki utpatti hoti hai. peshi mein jaaran ya okseekaran ki kriya se vahaaain ke glookoj ka jal aur kaarban daaioksaaid mein vibhanjan ho jaata hai. isse 0.0030 sein. taap bhi badh jaata hai. vahaaain upasthit okseejan vyaya ho jaata hai aur laiktik aml utpann hota hai, jo shareer mein rakt dvaara peshi mein hata diya jaata hai. shareer se pruthak‌ karke peshi ko kuchh samay tak uttejit karne se vah is aml ke ekatr hone se shramit ho jaati hai. yeh anveshan se poornataya siddh ho chuka hai ki okseejan ki anupasthiti is aml ke banane ka kaaran hai. glaaikojan (glycogen) iska poorvaroop hai.

peshi aur vyaayaam

vyaayaam ke samay peshiyon mein kuchh samay tak baar baar sankoch hote hain, jisse peshiyon mein oopar bataae hue sab prakaar ke parivartan hote hain aur gati karne ki oorja utpann hoti hai. oorja ki utpatti okseejan ke vyaya aur kaarban daaioksaaid ki utpatti se maaloom ki jaati hai. shvaas dvaara baahar nikli hui vaayu ko ekatr karke, uske vishleshan se ye donon maatraaeain maaloom ki ja sakti hain. isse vyaya hui okseejan ka pata lag jaata hai. yeh nirdhaarit ho chuka hai ki 1 liter okseejan ke vyaya se 5.14 kailori ooshma utpann hoti hai, jo 15.560 foot pound ke samaan hai.

sandarbh granth

  • staaling : fijiyauloji;
  • belis : prinsipls ov jenaral fijiyauloji ;
  • venabrij ; fijiyauloji ov maskyoolar ekasarasaaij;
  • shefr : histolauji
  1. tripaathi, Narendra naath (March 2004). saral jeevan vigyaan, bhaag-2. Kolkata: shekhar prakaashan. pa॰ 86-87.

inhein bhi dekhein

  • pesheetantr
  • maanav shareer ki peshiyon ki soochi