Circulatory System of Periplaneta
Important Questions on Circulatory System of Periplaneta
Why is the body cavity of a cockroach is not a true coelom but a haemocoel?
The blood circulation of Periplaneta is open type. Illustrate the statement describing the course of circulation in it.
Describe the blood circulatory system of Periplaneta in detail and draw a neat and labelled diagram of it.
How do contraction and relaxation of the alary muscles help in blood circulation?
Describe the process of blood circulation in Periplaneta.
Describe the structure and function of the heart in Periplaneta.
What is haemocoel? Describe it with reference to Periplaneta.
The heart of the chordates is said to be myogenic (which means the contraction is initiated in itself). If the heart is removed from the body it will keep beating provided some nourishing liquids such as Ringer’s solution is pumped through it. Will the same thing happen with the heart of the cockroach? Explain.
The blood of Periplaneta is not red. Which pigment do you think is absent in it?
Write the important functions of the blood of Periplaneta.
What is the function of the haemocytes found in the blood of Periplaneta?
Why is the blood of Periplaneta called Haemolymph?
The three sinuses in cockroach are not equal in size. Why?
What is haemocoel?
What are the alary muscles?
Name the different blood sinuses in Cockroach.
