How many ganglia lie in the thorax and abdomen respectively in cockroach?

Which of the following structures does the given figure represent?

Which of these is not a division of hindgut in cockroach?

How many chitinous teeth are present in the gizzard of cockroaches?

Ventral sclerites are known as tergites and dorsal sclerites are known as sternites.

Which of the following tissue sections has been represented in the given diagram?

In which of these structures is collagen fibers present in rows between parallel bundles of fibers?

Areolar tissue is present beneath the skin.