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the passage through which the nerve and blood vessels leave the root of the tooth.
the cartilaginous flap at the top of the mammalian trachea, which closes off the entrance to the...
a measure showing the number of dependents (aged 0-14 and over the age of 65) to the total...
the factor that changes in an investigation and is not under the control of the investigator....
a drug that inhibits (slows down) the action of the nervous system.
the blood vessel that carries blood from the liver to the inferior vena cava.