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Topic 1

Lifestyle Health and risk

TermDefinition
Double circulatiory system the blood passes through the heart twice
Single circulatiory system the blood passes through the heart once
Diffusion diffusion is the movement of particles from an area of high concentration to an area of low concentration
Open system No blood vessels
Closed system Has blood vessels
Single cells Diffusion can occur fast enough
An active animal Diffusion is not efficient Cells require nutrients and oxygen and the removal of waste products
Polarity opposite atoms have differently charged electrons
H2O Universal solvent allows biochemical reactions to occur in cells cytoplasm
Hydrogen bonding positively charged ions attach to negatively charged ions
Cohesion Bonds together
Adhesion Doesn't bond together
Coronary artery Gives blood to the heart
Valves Prevents back flow in veins
Created by: erinamcevoy
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