With ghe hwlp of a chart explain mechanism of cirvulqtion in cockroach

Circulation of blood in cockroach

• Cockroach has an open type of circulatory system.

• Poorly developed blood vessels which open into the haemocoel

• Organs located in the haemocoel bathed by blood (haemolymph)

• Haemolymph = Colourless plasma + Haemocytes

• Heart consists of an elongated muscular tube along the mid-dorsal line of the thorax and the abdomen.

• Differentiated into funnel-shaped chambers, with ostia on each side

  Flow of Blood: Sinuses → Ostia → Heart → Sinuses     

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