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Leokris [45]
3 years ago
11

Heart muscles contract and relax. What is the most important effect of

Biology
2 answers:
pochemuha3 years ago
8 0

Answer:

A. Blood is pushed through vessels

Explanation:

Heart muscles contract and relax. The most important effect of this action on the human body is Blood is pushed through vessels.

Hope it will help :)❤

Ronch [10]3 years ago
8 0

Answer:

A. Blood is pushed through vessels.

hope this answer helps you.....

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The correct option is A. Coal use in steam engines led to easier access to goods.

Explanation:

Coal is used in steam engines as a fuel. Coal is one of the cheapest source of energy and hence it has been serving mankind with various benefits since a long period of time.

The coal-based steam engines played a very important role in the developments made during the Industrial Revolution. Many industries started using coal as a power material and made progress.

The steam engines made it possible to transfer goods from one place to another very easily. As coal was a cheap source, hence trading of goods by steam engines was not very costly.

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Transporting Electrons

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