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a substance found in certain fatty foods or manufactured in the liver. High levels of cholesterol in the blood are thought to be linked to heart disease.
the remains of digestion, which are eliminated from the body via the anus, and contain...
the small amount of air that always remains in the lungs during breathing.
the ground substance component of connective tissue in which the cells of the tissue occur.
pigments that occur in the brightly coloured, yellow, orange or red parts of the plant, such as...
outgrowths that transmit nerve impulses away from the cell body of a neuron.