The hardest part in the animal body is

Identify the correct terms for the following analogy-based questions:
$(i)$ In cockroach,blood is : $Hemolymph$ :: In frog : ..........
$(ii)$ Before nymphal stage : $Wing$ $pad$ :: In adult cockroach : ...
$(iii)$ In earthworm : Tactile receptors :: In cockroach,dorsal side of the head : .....

Which of the following structures is common between an earthworm and a cockroach?

In mammals,Haversian canals are connected with each other by transverse canals,which are called:

Vibrissae are associated with the function of

In which of the following are Haversian canals found?