Circulatory System of Cockroach MCQ - Practice Questions with Answers
Edited By admin | Updated on Sep 18, 2023 18:34 AM | #NEET
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7 Questions around this concept.
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MEDIUMIn cockroach , heart comprises of
In case of cockroach, nephrocytes are found in
Haemolymph in a cockroach is devoid of
Hemocoel is divided by ______ horizontal partition into _____ wide and flattened sinuses
Which of the following statements is/are incorrect regarding cockroaches?
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Circulatory System of Cockroach
Circulatory System of Cockroach
- The circulatory system of cockroach is open type with blood flowing in open spaces.
- Blood flows freely in the body cavity which is known as haemocoel.
- Blood vessels are poorly developed
- The haemocoel is divided into sinuses or blood spaces.
- Visceral organs located in the haemocoel are bathed in blood (hemolymph) which is composed of colourless plasma and haemocytes.
Heart
- The heart of cockroach lies along the mid dorsal line of thorax and abdomen.
- It is an elongated muscular tube consisting of 13 funnel-shaped contractile chambers.
- Each contractile chamber of heart contains inhalant openings called ostia on either side
- Blood from sinuses enter heart through ostia and is pumped anteriorly to sinuses again.
- The pumping of blood is brought about by the contraction and relaxation of fan-shaped paired muscles called alary muscles.
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