Which of the following structures originates from the ectoderm?

Identify the correct sequence of organs in the digestive system of a cockroach.

Which of the following statements is correct regarding the cockroach?

Which of the following is the correct statement about the circulatory system of a cockroach?

Name the blood vessel that arises from the first chamber of the heart in a cockroach.

The figure given below shows the alimentary canal of a cockroach with a few structures labelled as $1, 2, 3$ and $4$. Identify the structure which is also called proventriculus and helps in grinding the food particles.