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a connected network of vessels and glands, which carry lymph throughout the body.
the outermost nucleated cytoplasmic layer of the Schwann cells that surrounds the axon of a...
the process whereby a particular change causes a response which reverses that change.
the natural resistances with which a person is born. It occurs because of a body's genetic make-...
a species that helps scientists identify the age of sedimentary rocks.
the second biological classification group (taxon) that is divided into phyla (for animals) or...