What is the difference between a single circulatory system and a double circulatory system?


The double circulatory system of blood flow refers to the separate systems of pulmonary circulation and the systemic circulation in amphibians, birds and mammals (including humans.) In contrast, fish have a single circulation system because they do not have lungs. All animals with lungs have a double circulatory system.

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circulatory system Cardiovascular system Double circulatory system Systemic circulation Pulmonary circulation Health Medical Pharma Anatomy Biology Angiology Organs Lung Blood Amphibian Environment systems

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