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Cnidarians have specialized stinging cells called cnidocytes
Some male birds and mammals congregate in communal courting grounds called leks.
Charles Darwin may be dead and gone but a recent write-in campaign has pitted him against Republican
Cardiac catheterization. Insertion of a tube called a catheter through a blood vessel. In this examp
The upper intake manifold, often called a plenum, attaches to the lower intake manifold.
The nucleus is bounded by a double membrane called the nuclear envelope