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valve between the right atrium and the right ventricle.
an organ system that passes nutrients, gases, hormones, blood cells, etc. to and from cells in...
a collection of tissues joined in a structural unit to serve a common function.
the complete set of alleles (different forms of genes) making up the genetic material of a...
the main blood vessel that returns deoxygenated blood from the head and thorax to the right...
structure that contains the two centrioles arranged at right angles to each other in animal...