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26 Cards in this Set
- Front
- Back
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cells need what 2 things from blood to do work?
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oxygen and nutrients
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diffusion
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the movement of molecules from a region of higher concentration to a region of lower concentration
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circulatory system's role
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rapid delivery of oxygen and nutrients to cells via diffusion
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side of the heart that receives oxygenated blood from lungs
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left side! pumps it to body tissues
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capillaries
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vessels where diffusion process occurs
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side of the heart that receives blood from tissues
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right side! pumps it to the lungs
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arteries versus veins
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arteries- carry blood away from heart
veins- carry blood to the heart |
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basic components of blood
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plasma- 555
BUFFY coat- <1% erythrocytes (RBC)- 45% |
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PLATELETS
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component that helps with clotting
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hemoglobin
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packed in RBC to transport oxygen
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gas that is diffuses from capillaries into the alveoli of the lungs and is then exhaled?
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CO2
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number of times heart will beat in life time
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over 3 billion times
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name 4 chambers of heart
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left and right ventricle
left and right atrium |
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function of valves
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allows blood to flow in one direction only
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junction that synchronizes heart cells during contraction
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gap junction
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coronary arteries
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carry blood to heart tissue
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sino atrial node (SA node)
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contains pacemaker cells that generates an electrical pulse in the heart
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atrio ventricular node (AV node)
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slows signal from atria to ventricles
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systolic pressure
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measures when ventricles are contracting and this is the HIGHEST pressure
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diastolic pressure
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measured when ventricles are relaxing, and is the LOWEST pressure
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vaso constriction
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increase blood pressure
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dilation
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decrease blood pressure
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heart attack
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blood flow is blocked going into heart tissues
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stroke
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blood flow is blocked in brain
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during exercise vessels in muscles...
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vaso dilate
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during exercise vessels in kidneys and digestive system...
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vaso constrict (not needed during exercise)
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