3. Answer the following questions
A. How will you identify male or female
cockroach?
B. Write a note on : Gizzard of cockroach.
C. Give the systematic position of cockroach.
D. What would have happened if cockroach
did not had gizzard?
E. What is the functional difference between
eyes of cockroach and human being?
F. What is the functional difference between
respiratory systems of cockroach and
human being?
Answers
Explanation:
A. Cockroach
It is probably the most loathed about insect ever present. But the fact remains that cockroaches have inhabited the earth for the past 300 million years and continue to be present on earth. Read along to know more about the external morphology and internal anatomy of a cockroach which belongs to the phylum Arthropoda. The common cockroach is scientifically known by the name Periplaneta americana.
B. The gizzard is a kind of muscular stomach in cockroach. It consists of sharp teeth which is able to grind the food into small parts. It is covered with round thick wall with muscular chitins. It consists of six teeth in the stomach which aids in the grinding of the food.
C. Under the Kingdom Animalia, cockroaches belong to the Phylum Arthropoda, Class Insecta, and Order Blattodea. The Order name is derived from the Greek blatta.
D. The food cannot be digested.
E. cockroach have compound eyes but human have simple eyes. the human eye possesses single large lens whereas cockroach have many small lenses .
F. The spiracles captures the oxygenated air and transfer to the tube like structures in the tracheae which distribute the oxygen to the cells of the cockroach, whereas in humans the oxygenated air enters into the body through the nostrils, larynx, pharynx and finally to lungs distributed by the capillaries.
I hope this may help you