The cuticle is an important structure in roundworms. Briefly describe its composition and role in the life cycle of the animal (especially the parasitic species).
a. The cuticle is made of chitin and provides protection and support. In parasitic species, it helps the worm attach to the host's intestinal wall.
b. The cuticle is composed of calcium carbonate and aids in buoyancy. In parasitic species, it facilitates swimming in host blood.
c. The cuticle is a soft, flexible tissue that allows for rapid movement. In parasitic species, it helps in burrowing into host tissues.
d. The cuticle is a transparent membrane for gas exchange. In parasitic species, it assists in the exchange of gases with the host.
