Photos de stock et Images plasmatiques

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<BR>Illustration of a basal plant cell, including the cell wall, nucleus (purple), chloroplasts (green) and central vacuole (transparent white)
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NERVE IMPULSE, DRAWING<BR>How a nerve impulse is transmitted through a neuron. The action potential (inflowing impulse) moves along the neuron's axon
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BLOOD VESSEL, DRAWING<BR>Blood vessel.<BR>Anatomy of a blood vessel showing the various layers, from right to left: - Capillary blood vessels (upper right-hand...
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DEPOLARIZATION<BR>Depolarization.<BR>Phospholipidic membrane with NA+ and K+ ion channels. In the first NA+ channel, NA+ ions penetrate the axon and the K+...
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BLOOD VESSEL, DRAWING<BR>Blood vessel and contents.<BR>Illustration showing the anatomy of a large blood capillary and its contents: blood
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CELL, DRAWING<BR>Emergence of procaryotes.<BR>Ilustration of one theory concerning the origin of procaryotes: Two elements are needed: - an envelope composed...
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HIV virus burgeonning from the membrane of a cell colorized TEM
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HIV-1 virus burgeonning from the membrane of a human T lymphocyte in culture colorized SEM, the bar represents 100 nm
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HIV-1 virus burgeonning from a membrane of a lymphocyte in culture colorized SEM
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HIV virus burgeonning from the membrane of a cell colorized TEM
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