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Some male birds and mammals congregate in communal courting grounds called leks.
The anterior pituitary is sometimes called the master gland because it secretes many hormones that r
Cerebral angiography. The four angiograms each reveal the distribution of blood vessels supplying th
Electrocardiography. (a) Electrodes are placed on the patient’s chest to record the electrical event
Luna Park at Coney Island was a vast living theater in which strollers were both spectators and acto
Children with disabilities used to be sent to special schools. In a process called mainstreaming or ...