Question

Fill in the boxes using the words given in the Help Box.

2. The two upper chambers of the heart are called_.

3. _is the fluid part of the blood.
4. The _carries pure blood from the lungs to the heart.
5. The rhythmic contraction and relaxation of the heart is
called_.​

Answer 1

Answer:

2) atrium

3)plasma

4) pulmonary artery

5) heartbeat

Explanation:

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Answer 2

Answer:

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Explanation:

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