The function of the heart is to move deoxygenated blood from the venous system through the right heart into the pulmonary circulation and to move oxygenated blood from the pulmonary circulation through the left heart into the systemic circulation.
<span>toxic chemicals is a major cause of water pollution.
In most cases, the toxic chemicals came from the residual from production process after companies done making their product.
Rather than safely create a method to dump this, many companies decided to recklessly throw them away in water source (such as river or lakes) which eventually create the water pollution.</span>
Answer:
The Civil Rights Act of 1964
Explanation:
A scientist will test it and support it with things so the scientist knows its true and that should be a theory no longer a hypothesis if they proved the information.