Question

How many ostia in cockroch?

Answer 1

Answer:

13

I hope this answer will help you

Answer 2

Explanation:

Ostia are structures which are related to circulatory system of cockroach. There is a 13segmented heart in cockroach which lies in mid-dorsally below the terga in pericardial sinus. At the posterior end of each chamber,a pair of these ostia are present laterally