189
Question
Flow of haemolymph in Cockroach is
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Solution
The correct option is D Heart Head Perivisceral sinus Pericardial sinus Ostia Heart
In cockroach, the flow of haemolymph is heart → head→ perivisceral sinus → pericardial sinus → ostia → heart. Heart in a cockroach is neurogenic. Haemocoel (body cavity) is a perivisceral cavity filled with colourless blood (haemolymph). When alary muscle contract the dorsal diaphragm became flat and pericardial increases. Blood from perivisceral sinus enter into pericardial sinus through a pore of dorsal diaphragm become dome-shaped and blood from pericardial sinus is forced into the heart through valvular ostia then the heart and aorta contract peristaltically. Blood flow from posterior end to anterior end in heart and flow into head sinus through the aorta.
In cockroach, the flow of haemolymph is heart → head→ perivisceral sinus → pericardial sinus → ostia → heart. Heart in a cockroach is neurogenic. Haemocoel (body cavity) is a perivisceral cavity filled with colourless blood (haemolymph). When alary muscle contract the dorsal diaphragm became flat and pericardial increases. Blood from perivisceral sinus enter into pericardial sinus through a pore of dorsal diaphragm become dome-shaped and blood from pericardial sinus is forced into the heart through valvular ostia then the heart and aorta contract peristaltically. Blood flow from posterior end to anterior end in heart and flow into head sinus through the aorta.
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