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Genes, chromosomes and DNA are three vital components of cells and many students often confuse them with each other.
DNA stands for Deoxyribose Nucleic Acid. DNA molecule...
The nervous system and endocrine system work together to maintain a state of constancy in the body's internal environment despite changes in the external environment. The effect of both systems is ach...
There are several important differences betwe...
Vaso-dilation: blood vessels near to the skin's surface dilate which allows more heat to be lost. This is because more blood can flow through as there is more room in the lumen.
The oxygen-haemoglobin dissociation curve is a graph that compares the % of haemoglobin saturated with oxygen on the y-axis to the partial pressure of oxygen in the blood on the x-axis (mmHg). It is a...
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