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...carbon atoms (called aromatic rings). These molecules can absorb incoming energy (usually in the form of light). As a result of the absorption of energy, electrons within the molecules change from a resting condition called the ‘ground state’ to an ‘excited state’ on a shell further away from the nucleus for a very brief period of time. Eventually, the excited...

...carbon dioxide. Leukocytes, or white blood cells, are involved in immune defence against infection. There are a variety of different types of leukocytes, all with distinct functions. You will learn more about these cells, and how to identify them, later on in the week. You might like to keep the virtual microscope open as you work through the week...Week 1: Histology: 2.3...