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The pumping of the heart is split into two main phases, diastole (relaxation) and systole (contraction) and involves the four main chambers of the heart, the atria and ventricles, as well as the associate...

Oxygen enters the nose/mouth along the trachea, bronchi, bronchioles and finally into the alveoli.The exchange of gases occurs between the alveoli and blood in the capillaries that supply the lungs. Capil...

For your GCSE, you need to know that there are three main differences between plant and animal cells:Plant cells have a cellulose cell wall while animal cells do not.Plant cells have chlo...

Relative frequency is the number of times an event occurs divided by the total number of trials conducted.
So for example, suppose you toss a coin 15 times, and it lands on heads 8 times and tails 7...

Prophase, Metaphase, Anaphase and Telophase.