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a heart chamber that receives blood from the body or lungs.
a sudden severe instance of abnormal heart function accompanied by chest pains and possible...
symbiosis where one organism lives on another (on the outside of another).
minute pores in the epidermis of a leaf or stem which allows for movement of gases and water...
a mixture of enzymes and other substances secreted by the exocrine cells of the pancreas.
the condition in which a persons' normal capacity to think or act is affected due to the...