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Some male birds and mammals congregate in communal courting grounds called leks.
Tubal ligation. To minimize the size of the incisions necessary, laparoscopic surgery may be used to
Cardiac catheterization. Insertion of a tube called a catheter through a blood vessel. In this examp
Squeeze hands and fingers. Compress and broaden the hand. Squeeze along each finger.
Finger pressure to a trigger point.
Diagram illustrating the difficulty encountered during the replication of the ends of linear chromos