The right and left atrium have chambers with ______.

spiral walls

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thick walls

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thin walls

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spongy walls

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Solution

The correct option is C thin walls
The upper two chambers of the heart are called right and left atrium. They are thin-walled sacs, which receive blood from the body and the lungs, respectively.

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\begin{matrix} C o l u m n A & C o l u m n B (i) R i g h t a t r i u m & (a) P u m p s d e o x y g e n a t e d b l o o d t o l u n g s (i i) L e f t a t r i u m & (b) R e c e i v e s o x y g e n a t e d b l o o d f r o m l u n g s (i i i) R i g h t v e n t r i c l e & (c) P u m p s o x y g e n a t e d b l o o d t o t h e b o d y (i v) L e f t v e n t r i c l e & (d) R e c e i v e s d e o x y g e n a t e d b l o o d f r o m t h e b o d y \end{matrix}

What is the name of the tissue wall which separates the right and left atrium?

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