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Related Flashcards
Cards In This Set
| Front | Back |
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What is the name of the nerve that slows down the beating of the human heart?
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Vagus nerve
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If a blood vessel brings blood back to the heart it is called a(n)...
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Vein
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If human veins, blood cannot flow backwards down towards the feet because of...
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Valves
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Compared to diastolic pressure, systolic pressure is...
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Always higher
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Blood low in oxygen from the head is dumed into the Right Atrium through the...
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Superior vena cava
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Blood that moves from the heart to the lungs is called...
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Pulmonary circulation
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How many chambers does the human heart have?
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4
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Where is th SA node located?
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Right Atrium
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What is the heart's natural pacemaker called?
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The SA node
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What blood circulation supplies the heart with oxygen rich blood?
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Coronary circulation
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What is the name of the largest artery in the blood?
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Aorta
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How do substances enter a hydra's cells and move around its body, since it does not have a circulatory system?
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Muscle contractions
Diffusion
Active transport
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What blood vessels are only 1-cell thick, allowing diffusion of substances to take place?
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Capillaries
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What is the relaxation phase of a heart beat called?
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Diastole
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What is an average normal blood pressure reading?
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120/80
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