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respiratory and circulatory system

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Question
Answer
what is the definition of vein:   blood vessels that carry blood to the heart  
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what is the definition of capillaries:   tiny, thin-walled blood vessels that allow the exchange of gases and nutrients, between the blood and cells and located between arteries and veins  
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what is the definition of arteries:   blood vessels that carry blood away from the heart  
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what blood cells contain hemoglobin?   red blood cells  
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when you exhale air, does the air pass through the trachea or the pharynx first?   trachea  
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when you inhale air, does the air pass through the trachea or the pharynx first?   pharynx  
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you are given a sample from a person's lungs. looking at it under a microscope, you see many little round sacks that are covered with capillaries. what structures are you looking at?   alveoli  
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where are blood cells produced?   marrow  
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what are xylem and what do they do?   xylem are tubes that transport water up from the roots to the rest of the parts of the plant.  
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how many chambers are in the heart?   4  
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name the parts of the human respiratory system, in order.   nasal and oral cavity, pharynx, larynx, trachea, right and left bronchi, and the right and left lung.  
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what is the respiratory system?   the system that controls the way we breathe, and contains the lungs, trachea, pharynx, larynx, oral and nasal cavity, and the bronchi  
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Created by: ls
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