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Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.

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In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.

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The average person is easily confused by the terms pharmaceutics and pharmacology, thinking they are one and the same. Whereas pharmaceutics is the science of preparing and dispensing drugs (otherwise known as the science of pharmacy), pharmacology is the study of medications.

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Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.

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The horizontal fraction bar was introduced by the Arabs.

Micrographs of nerve cells taken with different types of light microscopes. Micrographs of nerve cells taken with different types of light microscopes.
Animal cells and the extracellular matrix (ECM) Animal cells and the extracellular matrix (ECM)
Eukaryotic Cells Eukaryotic Cells
Pituitary hormones and their target cells, tissues, and/or organs. Pituitary hormones and their target cells, tissues, and/or organs.
Calipers being used to measure body fat on the triceps of a patient. Calipers being used to measure body fat on the triceps of a patient.
Multiple synapses on the body of a single neuron Multiple synapses on the body of a single neuron
Video: Power Supply Polyacrylamide Gel Protein Sample

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