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زیست شناسی - تنفس در پرندگان

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تنفس در پرندگان

» نوع مطلب : خلاصه درس ،

دستگاه تنفس در پرندگان

ساختمان دستگاه تنفسی در پرندگان :

.............

برای مشاهده متن کامل روی ادامه مطلب کلیک کنید

ساختمان دستگاه تنفسی در پرندگان :

1 . سیرنکس یا سوتک ( معادل حنجره )

2 . نای و نایژه و نایژک ها

3 . کیسه های هوایی : 3جفت جلویی و 2 جفت عقبی

4 . یک جفت شش

 

به علل زیر کارائی دستگاه تنفس در پرندگان بسیار بالاست :

   1 . بالا بودن توانایی شش ها : جذب مقدار اندک اکسیژن

2 . هموگلوبین آن ها قدرت پیوستگی بالائی با اکسیژن دارد

3 . وجود شبکه های مویرگی فراوان

4 . وجود میوگلوبین در ماهیچه های پرواز ( میوگلوبین شبیه هموگلوبین است

                                                    و وظیفه دخیره ی اکسیژن را دارد )

5 . استخوان های توخالی متصل به کیسه های هوائی

 

تفاوت تنفس پرندگان با دیگران

·        جهت جریان هوا در شش ها یک طرفه و از عقب به جلو

·        شش ها در هنگام دم خالی می شوند  و در بازدم پر می شوند  

 


نوشته شده در : جمعه 8 بهمن 1389  توسط : نارسیس .    نظرات() .

برچسب ها: پرواز پرندگان ، تنفس پرندگان ، میوگلوبین ،
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