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blood circuit to and from the cardiac muscle.
regions or bundles of vascular tissue consisting of xylem and phloem separated by cambium.
the cavity used for transport purposes. It has one opening to the environment through which...
an organelle that occurs in the cytoplasm of both plant and animal cells. It is made from stacks...
pollutant gases such as nitrogen monoxide and nitrogen dioxide. They are produced during ...
the most common and most movable type of joint in the body of a mammal e.g. the elbow.