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Wood first appeared in plants called progymnosperms.
Cerebral angiography. The four angiograms each reveal the distribution of blood vessels supplying th
How lenses correct visual problems: (A) emmetropia; (B) myopia; (C) hyperopia; (D) corrected myopia; ...
The upper intake manifold, often called a plenum, attaches to the lower intake manifold.
A lesion called a plaque in the brain of an individual with Alzheimer disease. A ring of degeneratin
A nerve cell (neuron) has extensions called dendrites