1
Each pulse that you can feel is caused by one beat of your ……….
2
The heart and blood vessels together make up the ………. system.
3
When blood contains a lot of oxygen, it is bright red. We say that the blood is.……...
4
Blood picks up oxygen as it passes through the ………
5
The ……... side of the heart contains oxygenated blood.
6
The heart has …… chambers
7
When heart muscle contracts, it gets ……..
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