The heart can contract. what does this mean?​

When the hearts contracts

it pushes blood out of the heart

and it goes to a blood vessel of the

circulatory system.

Explanation:

When the heart contracts, it pushes the blood out of the heart and into the large blood vessels of the circulatory system. From here, the blood goes to all of the organs and tissues of the body. During systole, a person's blood pressure increases.

Explanation:

a adaptation is when organism changes itself to fit the environment

ex. when its cold outside i wear a jacket

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