(a) What are the upper parts of the heart called?
(b) What are the lower parts of the heart called?
(c) What is the name of blood vessels which connect arteries to veins?
(d) (i) Which side of the heart pumps blood into the lungs?
(ii) Which side of the heart pumps blood into entire body (except the lungs)?

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Solution

(a) The upper parts of the heart are called atria.

(b) The lower parts of the heart are called ventricles.

(c) Capillaries are thin-walled tubes, which connect the arteries to the veins.

(d) (i) Right side of the heart pumps blood into the lungs.
(ii) Left side of the heart pumps blood to the entire body, except the lungs.

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

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