True- Because there's a thing called "Stranger Danger" because if you think you know the person, but you really don't. People lie online all the time, regarding there age and past things. =) Hoped this helped
Answer:
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The cardio-respiratory system consists of the cardio vascular system (heart and blood vessels) together with respiratory system (lungs and air ways). These systems work to transport oxygen to the muscles and organs of the body and remove waste products including carbon dioxide.
The layer that encloses and protects the heart is
Pericardium
