shvaasanali

shvaasanali (trachea) aur us se sambandhit ang

manushya, pashuon aur pakshiyon ke shareer mein shvaasanali1 ya saaains ki nali vah nali hoti hai jo gale ki svaragranthi2 (lairinks) ko fefadon se jodti hai aur munh se fefadon tak hava pahuainchaane ke raaste ka ek mahatvapoorn bhaag hai. shvaasanali ki aantarik satah par kuchh vishesh koshikaaon3 ki parat hoti hai jin se shleshma 4 rista rahata hai. saaains ke saath shareer mein pravesh hue adhiktar keetaanu, dhool va anya haanikaarak kan is shleshma se chipk kar fains jaate hain aur fefadon tak naheen pahuainch paate. ashuddhataaon se mishrit yeh shleshma ya to anaayaas hi pi liya jaata hai, jis se ye pet mein pahuainch kar vahaan par haajmein ke rasaayanon dvaara nasht kar diya jaata hai, ya fir balagm ban kar munh mein ubhar aata hai jahaaain se ise thooka ya nigla ja sakta hai. machhaliyon ke shareer mein shvaasanali naheen hoti.

anukram

manushyon mein

manushyon mein shvaasanali ki bheetari chaudaai 21 se 27 mileemeetar aur lambaai 10 se 16 senteemeetar tak hoti hai. yeh svaragranthi se shuroo ho kar neeche fefadon ki taraf aati hai aur fir do naaliyon mein bat jaati hai jinhein shvasniyaaain (bronkaai)5 kehte hain. daain shvasani daaeain fefadein mein saans le jaati hai aur baain shvasani baaeain fefadein mein. shvaasanali ko akadkar saans ke liye khula rakhane ke liye shvaasanali ke andar thodi-thodi doori par 15 se 20 upasthi (kaartilij)6 ke bane chhalle hote hain. in sab chhallon se judi hui ek maansapeshi hoti hai. jab manushya khaansi karta hai to yeh maansapeshi sikud jaati hai jis se yeh chhalle bhi sikud jaate hain aur shvaasanali thodi tang ho jaati hai jaati hai. shvaasanali ke sikudne se gujrane waali hava ka dabaav aur gati theek usi tarah se badh jaati hai jis tarah agar kisi paani ki nali ko sikoda jaae to paani zyaada jor se aata hai. agar koi balagm ya kisi cheej ke kan shvaasanali mein chipke ya fanse hon to vo hava ke is tej bahaav se munh ki taraf udte hue chale jaate hain. jukaam ya koi glat padaarth shvaasanali mein jaane ki haalat mein khaansane ki isi vyavastha se shvaasanali swayam ko saaf kar leti hai.

graasanaal aur shvaasanali

gale se pet tak chalti hui ek aur bhi nali hoti hai jise graasanaal7 ya khaane ki nali kehte hain. graasanaal aur shvaasanali donon hi gale se shuroo hoteen hain. shvaasanali ke oopar ek chhota sa lolak (palla) hota hai jise kanthachhad8 (epiglaatis) kehte hain. jab koi khaana khaata hai ya kuchh peeta hai to yeh kanthachhad gir kar shvaasanali ko kas ke band kar deta hai. isi kaaran se khaana graasanaal se hote hue pet mein to jaata hai lekin shvaasanaal ya fefadon mein bilkul pravesh naheen karta.

inhein bhi dekhein

  • svaragranthi
  • fefada
  • shvaasanali ke nichle hisse ka sankraman
  • graasanaal
  • gardan

tippani

1.^ angreji mein shvaasanali ko traikiya (trachea) kehte hain
2.^ angreji mein svaragranthi ko lairinks (larynx) ya vaaisabaaks (voicebox) kehte hain
3.^ angreji mein koshikaaon ko sail (cell) kehte hain
4.^ angreji mein aanv ko myookas (mucus) kehte hain
5.^ angreji mein shvasani ko bronkas (bronchus) kehte hain
6.^ angreji mein upasthi ko kaartilij (cartilage) kehte hain
7.^ angreji mein graasanaal ko esaafegas (esophagus) kehte hain
8.^ angreji mein kanthachhad ko epiglaatis (epiglottis) kehte hain