Components of Circulatory System: Diaphragms and Sinuses
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Questions and Answers

Which region of the hindgut in insects is referred to as the small intestine?

  • Haemocoel
  • Colon
  • Rectum
  • Ileum (correct)
  • What is the main function of the hindgut in insects?

  • Production of enzymes
  • Digestion of proteins
  • Reabsorption of salts and water (correct)
  • Generation of blood cells
  • What is the circulatory fluid in insects that freely flows through the body cavity called?

  • Blood plasma
  • Saliva
  • Hemoglobin
  • Hemolymph (correct)
  • Which part of the hindgut in insects acts as a fermentation chamber in scarabid and termite larvae?

    <p>Ileum</p> Signup and view all the answers

    Which insect organ system has an open circulatory system where hemolymph directly irrigates tissues and organs?

    <p>Circulatory system</p> Signup and view all the answers

    Which insect organ secretes watery saliva with an amylase and maltase mix during feeding?

    <p>Salivary glands</p> Signup and view all the answers

    What is the function of gills in aquatic insects?

    <p>To exchange gases through the body surface</p> Signup and view all the answers

    Which of the following is an example of an insect with rectal gills?

    <p>Dragonfly naiad</p> Signup and view all the answers

    What acts as a physical gill in aquatic insects like water bugs?

    <p>Air bubble stored beneath wings</p> Signup and view all the answers

    Which part of the insect's body holds a thin film of air indefinitely?

    <p>Plastron with hydrofuge hairs</p> Signup and view all the answers

    What are the two projections of a nerve cell in insects?

    <p>Axon and dendrites</p> Signup and view all the answers

    Which nervous system part in insects connects to effecter organs like muscles?

    <p>Central nervous system</p> Signup and view all the answers

    Where is the dorsal vessel situated in insects?

    <p>In the dorsal sinus</p> Signup and view all the answers

    What is the main function of the dorsal vessel in insects?

    <p>Transport haemolymph to the head</p> Signup and view all the answers

    What is the role of ostia in the insect heart?

    <p>Expanding and contracting to facilitate flow</p> Signup and view all the answers

    Which part of the insect circulatory system is responsible for receiving blood through ostia?

    <p>Dorsal vessel</p> Signup and view all the answers

    What is the anterior prolongation of the dorsal vessel that transports haemolymph to the head called?

    <p>Aorta</p> Signup and view all the answers

    Which longitudinal compartment is known as the Perineural sinus in insects?

    <p>Ventral sinus</p> Signup and view all the answers

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