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The heart is made up of four chambers; the left atria, left ventricle, right atria and the right ventricle. The cardiac cycle is made up of repeating phases of systole (contraction) and diastole (relaxati...

Mitosis is the process of cell division - in which one cell divides to form two cells that are identical to it and then also to each other. These new cells that are formed are called sister cells. The pro...

The main difference between the following two is that bacterial cells do not possess a nucleus or any membrane-bound organelles. In addition to that, bacterial cell walls are made out of murein, plasmids ...

In order to remember the definition of homeostasis it is useful to memorise the mnemonic ‘MACIE’; the Maintenance of A Constant Internal Environment. Conditions in the body must be constantly controlled b...

ADH (anti diuretic hormone) is a hormone that is released when the hypothalamus detects high blood osmolarity or when blood pressure is low. It is released from the posterior pituitary gland into the bloo...