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small fluid-filled spaces in the matrix of bone and cartilage in which cartilage and bone cells occur.
biological classification group (taxon) for plants that are divided into classes.
nutrients are obtained by digesting organic compounds that have to be acquired and ingested by...
the outermost layer of the plant cell wall that forms the contact surface between adjacent plant...
the process whereby nutrients that have been absorbed from the digestive system are taken up by...
a genus of the Protozoa consisting of shapeless unicellular organisms that move by means...