tegument!
monogenea are ectoparasitic while trematoda are endoparasitic
tegument
Protective covering is a covering that is intend to protect from damage or injury.
protective covering (a lead apron)
The waxy protective covering of a land plant is called a cuticle.
The protective covering on the package was damaged. She is as protective as a mother hen.
Armor.
cornea
The skin (or hide) and fur are the protective covering of a raccoon.
it's shell..
Enamel.
Yes!