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In the heart there are 4 chambers; the upper 2 chambers are called the atria and the bottom two chambers are called the ventricles. The right and the left side of the heart are separated by the interventr...

That depends on whether there is light available. Plants are always respiring, day and night, as it provides them with the energy (in the form of ATP) required to survive. During the day however, when the...

Respiration uses 'food' in the form of glucose with oxygen to store (never create) energy in the form of ATP, along with CO2 and H2O. Photosynthesis uses energy from light with CO2 and H2O to create/store...

The heart is myogenic, meaning it initiates its own muscle contraction. At the Sinoatrial Node (SAN), found in the right atrium, an electrical impulse is generated that spreads across the atria, causing t...

The human body has evolved to be able to protect itself from it's external environment, especially preventing microbes entering the body, invading our cells and causing infectious diseases. Some of the co...