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Tergosternal muscles help in the blood circulation in a cockroach as well as in movement of the wings for flying. I came across a question that claims that these muscles are used in blood circulation as well. I can't seem to see a relation between blood circulation and these muscles.

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    $\begingroup$ Could you link to the question that you reference? Here's how! $\endgroup$
    – theforestecologist ♦
    Commented Dec 29, 2016 at 19:29

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It is not the tergo sternal muscles that are involved in blood circulation in cockroaches. Tergo sternal muscles help in breathing. It is the Alary muscles that help in blood circulation. The alary muscles are associated with all the thireen chambers of cockroach's heart on either side of it. The alternate contraction and relaxation of these muscles help to pump the blood. Alary muscles

Sources which support my answer:

  1. Tergo sternal muscles are involved in respiration, Look into the book "A Dictionary of Entomology" pg 4, link

  2. Alary muscles help in blood circulation, link

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    $\begingroup$ Please provide citations/links to the sources you used to help provide some credibility to your answer $\endgroup$
    – theforestecologist ♦
    Commented Dec 29, 2016 at 19:25
  • $\begingroup$ @theforestecologist I have included suitable links in support of my answer please check them. $\endgroup$
    – jyoti proy
    Commented Dec 30, 2016 at 20:29

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