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the main blood vessel that returns deoxygenated blood from the head and thorax to the right atrium of the heart.
water-proof, waxy suberin-thickened layer on the radial and transverse cell walls of the...
the destruction of a donated organ by the immune system of the recipient.
the splitting of water molecules into oxygen atoms and energy-rich hydrogen atoms to be used in...
irreversible disease where the alveoli are damaged, resulting in breathing difficulties.
in plants: the first plant to become established in an area.in plants: the first plant to become...