Question

BIOLOGY XI-B
all
348. In cockroach, blood flows through ostia from​

Answer 1

Answer:

Correct answer is HEART.

Answer 2

In cockroach, blood flows through ostia from​ heart.

Explanation:

In cockroach, the flow of blood takes place in as follows:-

The flow chart of blood flow is as follows :-

• Flow of blood is known as hemolymph

     heart → head→ perivisceral sinus → pericardial sinus → ostia → heart.

• Heart present in a cockroach is neurogenic.

• Body cavity is known as Haemocoel. This  Haemocoel is a perivisceral cavity which is filled with colourless blood  
• This colourless blood is called haemolymph.
• In heart the alary muscle will contract the dorsal diaphragm ad  became flat and pericardial functions to increases.
• Blood moving from the perivisceral sinus will enter into pericardial sinus through a pore of dorsal diaphragm .
• It is Dome-shaped where the blood from pericardial sinus is forced into the heart.
• Thus blood travels from  valvular ostia and wish that the then the heart and aorta contract peristaltically.

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