Explanation:
the heart and blood vessels make up the circulatory system
Answer:
B. circulatory
Circulatory system is made up of blood vessels that would carry blood to heart. It is also known as the vascular or cardiovascular system.
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the circulatory system
The answer is in the image attached.
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The stomach produces hydrochloric acid.It kills many harmful microorganisms that might have been swallowed along with the food.The enzymes work best in acidic conditions-at low pH
