কিভাবে অক্সিজেন ও কার্বন- ডাই-অক্সাইড আদান প্রদান হয়:
ফুসফুসে বায়ু প্রবেশ করে বিভিন্ন ডাক্টের বা নালীর মাধ্যমে আ্যালভিওলি বা বায়ুকোষে এসে পৌঁছে এই কোষসমূ ক্ষুদ্রাকৃতি এবং এর কোষ পর্দার উপর জালিকা (Capillary) থাকে। পালমোনারী ধমনীর মাধ্যমে কার্বন- ডাই-অক্সাইড যুক্ত রক্ত এই জালিকায় এসে প্রবেশ করে। জালিকার প্রাচির অত্যন্ত পাতলা। এর মধ্য দিয়ে কার্বন- ডাই- অক্সাইড সহজে জালিকা ত্যাগ করে আ্যালভিওরিতে যায় এবং অক্সিজেন আ্যালভিওলি হতে জালিকাতে প্রবেশ করে। জালিকা থেকে অক্সিজেন যুক্ত রক্ত পালমোনারী শিরার মাধ্যমে হৃৎপিণ্ডের বাম অলিন্দে যায় এবং পরবর্তীতে সমস্ত শরীরে ধমনী দিয়ে ছড়িয়ে পড়ে, কোষে কোষে অক্সিজেন পৌঁছে দেয়।
সফল রোগীর ভিডিও প্রমাণ
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