a reaction in which chemical substances are built up and energy is used

a deficiency in the number of circulating red blood cells or haemoglobin concentration in the blood

not requiring oxygen

the partial oxidation of organic compounds in the cell to release energy, in a process which does not require oxygen

an artificial or naturally occurring connection between two structures, which are normally separate, for example between blood vessels or loops of intestine

a group of male sex hormones e.g., testosterone

a negatively charged particle

Pupils that are not symmetrical in size. i.e. one pupil may be constricted and the other dilated.

a positively charged electrode to which electrons are attracted

loss of appetite for food