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Electrocardiography. (a) Electrodes are placed on the patient’s chest to record the electrical event
Darwin’s finches: Adaptive radiation of bill types.
Our planet absorbs solar radiation
A thin cleft, called the synapse, separates one cell from another.
A lesion called a plaque in the brain of an individual with Alzheimer disease. A ring of degeneratin
Types of ionizing and nonionizing radiation