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Single circulation
1. Occurrence: Found in only fishes.
2. Mode of circulation: Blood passes only once through the heart to supply once to the body.
3. Nature of blood: Only venous blood passes through the heart.
4. Efficiency: Less efficient as gill capillaries slow down the blood flow so the body receives blood at a low pressure which decreases the rate of oxygen supply to the cells.
Double circulation
1. Occurrence: Found in amphibians, reptiles, birds and mammals.
2. Mode of circulation: Blood passes twice through the heart to supply once to the body.
3. Nature of blood: Mixed or oxygenated or venous blood passes through heart.
4. Efficiency: More efficient as blood flows at higher pressure, especially in birds and mammals, which increases the rate of food and oxygen supply to the cell and also rapid removal of wastes from them.
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Differences between single and double circulation?
what is the different between single and double circulation
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Compare between single loop circulation and double loop circulation?
In single loop circulation, blood flows through the heart and body in a single circuit, while in double loop circulation, blood flows through two separate circuits in the body: pulmonary circulation and systemic circulation. Single loop circulation is found in fish, while double loop circulation is found in humans and other mammals. Double loop circulation allows for separation of oxygenated and deoxygenated blood, leading to more efficient oxygen delivery to tissues.
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What is the difference between double circulation and single circulation found in vertebrates?
Double circulation involves two separate circuits for blood flow: the pulmonary circuit, which carries deoxygenated blood from the heart to the lungs for oxygenation, and the systemic circuit, which delivers oxygenated blood from the heart to the rest of the body. In contrast, single circulation, found in some fish, involves a single circuit where blood flows from the heart to the gills for oxygenation and then directly to the rest of the body before returning to the heart. This means that in single circulation, blood passes through the heart only once per complete circuit, whereas in double circulation, it passes through the heart twice. Consequently, double circulation allows for more efficient oxygen delivery and higher metabolic rates in terrestrial vertebrates.
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A twin bedroom has two single beds, a double bedroom has a double bed!
