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An open circulatory system refers to blood not being sealed in veins and arteries and instead diffuses around the body can be open to the outside environment.

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An open circulatory system consists of vessels that empties out into the body cavity and carries substances using haemolymph (same as the body fluid)

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Poorly perfused areas of an insect may include legs as they lack the mechanisms required to transport blood to those regions of their body

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The open circulatory system refers to circulated fluids that are emptied into the body cavity, whereby the haemolymph (circulatory fluids) aren't contained in vessels.

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large blood volume in short distance of circulation

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An open circulatory system refers to a system where the circulating fluid empties into the body cavities, rather than being contained in vessels.

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Auxiliary hearts direct flow of haemolymph throughout the insects body.

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this is an advantage because their heads do not control or aid (nose or air ways) any of the processes, the exchange of materials happens naturally through their entire body as well as there is not only one central control for the flow of fluids and air.

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An open circulator system is one where the circulatory fluid (haemolymph in insects) is not distributed across the body through a closed circuit, but rather is allowed to diffuse openly throughout the body.

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The areas in the insect body furthest away from the the heart as it has to travel the furthest, such as the limbs.

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An open circulatory system refers to a system where the circulatory fluid empties out into the body cavity and isn't contained within vessels.

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A system in which the circulating fluid is not enclosed in vessels at all times

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A open circulatory system can openly diffuse with the environment , as the circulatory fluid is not contained within vessels and empties into the body cavity.

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Areas in the insect body that may be poorly perfused could be extremities, such as legs and wings.

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The areas that are most poorly perfused refer to areas with the least amount of Haemolymph flow which in this example would be the head (including antennas) and the legs.

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Areas that are poorly perfused may include appendages such as the legs or antennae

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an open system is lacking arteries and veins. The blood thus flows freely throughout their bodies, lubricating tissues and transporting nutrients and wastes.

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Insects have auxiliary hearts and structures that guide the flow of circulatory fluids.

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The legs, by virtue of their distance from the dorsal vessel, would be poorly perfused.

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Areas that might be poorly perfused would the be limbs such as the legs which are furthest away from the body.

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An open

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An open system differs from a regular blood system by the fact that it is not bound by tissues but rather flows throughout the body cavity.

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The extremities of the body (i.e. the legs) will be most poorly perfused due to their distance from the dorsal vessel.

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The area that furthest away from heart will be most poorly perfused, such as legs and wings.

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An open circulatory system means that the blood flows directly through the tissue and not through a series of vessels like in a closed system

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The limbs would be the most poorly perfused because they are the furthest away from the tubular hearts thus receiving the least haemolymph

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It requires less energy for distribution than a closed system.

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A cockroach can last longer than an organism with an open system as it does not need its brain to control its circulatory system meaning oxygen can still flow readily to organs in the body.

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Auxiliary hearts in insects are responsible for directing the flow of circulatory fluids (haemolymph) throughout the body.

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Open systems have lower blood pressure than closed, so they would not experience uncontrollable bleeding as closed systems would. This would result in the open system species experiencing blood clotting at the point of decapitation, whereas the species with a closed system would bleed out.

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Insects have auxiliary hearts that direct the flow of haemolymph to certain parts of the insect as well as a dorsal vessel that collects blood from the abdomen towards the head with the help of these hearts.

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Would require less metabolic activity.

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Possible mechanisms include valves that move the liquid around the body as well as a large volume of blood in order to access all areas of the body.

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Open system organisms exchange materials between them and their surroundings. Means they can survive longer without a nervous system as it doesn't control their circulatrory systems.

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This is an advantage as the circuit isn't broken due to the lack of a head meaning body tissues can still receive haemolymph and continue to function

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Insects contain auxiliary hearts to help supply haemolymph to appendages.

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Insects have auxiliary hearts that pump haemolymph to their appendages, and which act independently of the dorsal heart