Answer:
1) A cardiovascular system is an organ system that conveys blood through vessels to and from all parts of the body, carrying nutrients and oxygen to tissues and removing carbon dioxide and other wastes.
2) "Capillaries connect the arteries to veins. The arteries deliver the oxygen-rich blood to the capillaries, where the actual exchange of oxygen and carbon dioxide occurs. The capillaries then deliver the waste-rich blood to the veins for transport back to the lungs and heart. Veins carry the blood back to the heart."
3) A heart attack is a blockage of blood flow to the heart muscle.
Answer:
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Explanation:
Informal writing is similar to conversational English. It might include slang, figures of speech, etc. Informal writing has a more personal tone, similar to if you were to speak directly to your audience. Simple: Informal writing uses shorter sentence, and some of them might be incomplete.
Within a week, the wood we left outside had begun to decay.
