Which of the following structures originates from the ectoderm?

The color of the hemolymph found in a cockroach is .....

Excretion in cockroach takes place by

In male cockroaches,sperms are stored in which part of the reproductive system?

Describe the structure of the heart and the path of blood circulation in a cockroach.

In cockroaches,at the junction of $............$ and $............$,about $............$ yellow-colored,thin,thread-like Malpighian tubules are present.