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The 'passé composé' - formed by the auxiliary 'avoir' or 'etre' conjugated in the present tense, followed by the past participle of the verb being conjugated - is used the most when speak...

Arteries have a much thicker muscular layer than veins, as this allows them to contract strongly and generate a high pressure to allow blood to be quickly transported to tissues in the body. Arteries also...

Hydraulic action, abrasion, attrition and solution. 

A single circulatory system is where blood flow starts with deoxygenated blood being pumped by the heart to the lungs or gills and then travelling directly to the rest of the body’s tissues. Found in fish...

Resting potential at - 75mV

Stimulus causes opening of sodium channels and influx of sodium ions, membrane becomes less polarized

Threshold potential reached at -55mV, opening of many more s...