ابزار وبمستر

کنکور زیست و شیمی تبریز - دریچه های قلب
کنکور زیست و شیمی تبریز
تقویتی و کنکور زیست شناسی و شیمی تبریز
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1-دهلیزی -بطنی 
2-دریچه سینی 

-دریچه دهلیزی- بطنی رو  که بین دهلیز و بطن چپ قرار دارد میترال یا دولختی می گویند.
-دریچه دهلیزی - بطنی که بین دهلیز و بطن راست قرار دارد رو دریچه سه لختی می گویند.

*دریچه های سینی در ابتدای سرخرگ های خروجی از قلب قرار دارند.(سرخرگ ششی و آئورت).

*** صدا های قلب:

1-صدای اول (پووم) قوی٬ گنگ  و طولانی تر است .و به هنگام بسته شدن دریچه های دولختی وسه لختی هنگام شروع انقباض بطن ها ایجاد می شود.

2-صدای دوم (تاک) کوتاهتر٬ واضح وهنگام بسته شدن دریچه های سینی ابتدای سرخرگ ها مربوط است که با شروع استراحت بطن  ٬ همراه است .

* بین صدای اول و دوم قلب 5/. ثانیه طول می کشد.

*بر اساس منحنی الکتروکاردیوگرام ٬ صدای اول قلب بر روی موج S. وصدای دوم قلب کمی بعد از موج T ایجاد می شود.

تالیف استاد ارزومند - دبیر زیست و شیمی تبریز




نوع مطلب : تقویتی تبریز، تدریس خصوصی تبریز، زیست شناسی، کلاس کنکور تبریز، كنكور زیست شناسی تبریز، تقویتی زیست شناسی تبریز، زیست شناسی دهم، جزوه زیست شناسی، 
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